List of numbers From Wikipedia, the free encyclopedia Jump to: navigation, search This is a list of articles about numbers (not about numerals). Contents [hide] * 1 Rational numbers o 1.1 Notable rational numbers + 1.1.1 Natural numbers + 1.1.2 Powers of ten o 1.2 Integers + 1.2.1 Notable integers + 1.2.2 Named integers o 1.3 Prime numbers o 1.4 Perfect numbers o 1.5 Cardinal numbers + 1.5.1 Small numbers + 1.5.2 English names for powers of 10 + 1.5.3 Proposed systematic names for powers of 10 # 1.5.3.1 Gillion system # 1.5.3.2 Myriad system # 1.5.3.3 Googol and others # 1.5.3.4 SI-derived o 1.6 Fractional numbers * 2 Irrational numbers o 2.1 Algebraic numbers o 2.2 Transcendental numbers * 3 Hypercomplex numbers o 3.1 Algebraic complex numbers o 3.2 Other hypercomplex numbers * 4 Transfinite numbers * 5 Numbers representing measured quantities * 6 Numbers without specific values * 7 Bases * 8 See also * 9 Further reading * 10 External links [edit] Rational numbers [edit] Notable rational numbers [edit] Natural numbers 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 210 220 230 240 250 260 270 280 290 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000 8000 9000 10k-100k 100k-1M 1M-10M 10M-100M 100M-1000M Larger #s [edit] Powers of ten See: Orders of magnitude (numbers) [edit] Integers [edit] Notable integers Other numbers that are notable for their mathematical properties or cultural meanings include: * -40 * -1 * 211 * 221 * 222 * 223 * 227 * 228 * 229 * 233 * 235 * 239 * 241 * 242 * 251 * 255 * 256 * 257 * 263 * 269 * 273 * 284 * 360 * 420 * 451 * 496 * 555 * 666 * 720 * 786 * 911 * 1001 * 1089 * 1337 * 1729 * 3600 * 6174 * 7744 * 8128 * 69105 * 142857 [edit] Named integers * Graham's number * Hardy-Ramanujan number * Skewes' number * Steinhaus' Mega and Megiston, Moser's number * Number of the Beast * Kaprekar's constant [edit] Prime numbers A prime number is a positive integer which has exactly two divisors: one and itself. * List of prime numbers The first 100 prime numbers: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 [edit] Perfect numbers A perfect number is an integer which is the sum of its positive proper divisors (all divisors except itself). The first ten perfect numbers: 1 6 2 28 3 496 4 8 128 5 33 550 336 6 8 589 869 056 7 137 438 691 328 8 2 305 843 008 139 952 128 9 2 658 455 991 569 831 744 654 692 615 953 842 176 10 191 561 942 608 236 107 294 793 378 084 303 638 130 997 321 548 169 216 [edit] Cardinal numbers In the following tables, [and] indicates that the word and is used in some dialects (such as British English), and omitted in other dialects (such as American English). [edit] Small numbers This table demonstrates the standard English construction of small cardinal numbers up to ten million -- names for which all variants of English agree. Value Name Alternate names 0 Zero aught, cipher, cypher, goose egg, nada, naught, nil, none, nought, nowt, null, ought, oh, squat, zed, zilch, zip 1 One ace, single, singleton, unary, unit, unity 2 Two binary, brace, couple, couplet, distich, deuce, double, doubleton, duad, duality, duet, duo, dyad, pair, span, twain, twosome, yoke 3 Three deuce-ace, leash, set, tercet, ternary, ternion, terzetto, threesome, tierce, trey, triad, trine, trinity, trio, triplet, troika 4 Four foursome, quadruplet, quatern, quaternary, quaternion, quaternity, quartet, tetrad 5 Five cinque, fin, fivesome, pentad, quint, quintet, quintuplet 6 Six half dozen, hexad, sestet, sextet, sextuplet, sise 7 Seven heptad, septet, septuplet 8 Eight octad, octave, octet, octonary, octuplet, ogdoad, byte (in computing terms) 9 Nine ennead 10 Ten deca 11 Eleven 12 Twelve dozen 13 Thirteen baker's dozen, long dozen 14 Fourteen 15 Fifteen 16 Sixteen 17 Seventeen 18 Eighteen 19 Nineteen 20 Twenty score 21 Twenty-one 22 Twenty-two 23 Twenty-three 24 Twenty-four two dozen 25 Twenty-five 26 Twenty-six 27 Twenty-seven 28 Twenty-eight 29 Twenty-nine 30 Thirty 31 Thirty-one 40 Forty 50 Fifty Half - century 60 Sixty shock 70 Seventy three-score and ten 80 Eighty four-score 87 Eighty-seven four-score and seven 90 Ninety 100 One hundred centred, century, ton, short hundred 101 One hundred [and] one 110 One hundred [and] ten 111 One hundred [and] eleven 120 One hundred [and] twenty long hundred, great hundred, (obsolete) hundred 121 One hundred [and] twenty-one 144 One hundred [and] forty-four gross, dozen dozen, small gross 200 Two hundred 300 Three hundred 666 Six Hundred [and] sixty-six Number of the Beast 1 000 One thousand chiliad, grand (or G), thou, yard, kilo (often shortened to K) 1 001 One thousand [and] one 1 010 One thousand [and] ten 1 011 One thousand [and] eleven 1 024 One thousand [and] twenty-four kilo (in computing, see binary prefix) (often shortened to K) 1 100 One thousand one hundred 1 101 One thousand one hundred [and] one 1 728 One thousand seven hundred [and] twenty-eight great gross, long gross, dozen gross 2 000 Two thousand 10 000 Ten thousand myriad 100 000 One hundred thousand lakh 1 000 000 One million meg, mil, (often shortened to M) 1 048 576 One million forty-eight thousand five hundred [and] seventy-six meg (in computing, see binary prefix) (often shortened to M) 10 000 000 Ten million crore [edit] English names for powers of 10 This table compares the English names of cardinal numbers according to various American, British, and Continental European conventions. See names of numbers in English or English-language numerals for more information on naming numbers. Short scale Long scale Power Value American & Modern British Traditional British (Nicolas Chuquet) Continental European (Jacques Peletier du Mans) of a thousand of a million 100 One 1000-1+1 10000000 101 Ten 102 Hundred 103 Thousand 10000+1 10000000.5 106 Million 10001+1 10000001 109 Billion Thousand million Milliard 10002+1 10000001.5 1012 Trillion Billion 10003+1 10000002 1015 Quadrillion Thousand billion Billiard 10004+1 10000002.5 1018 Quintillion Trillion 10005+1 10000003 1021 Sextillion Thousand trillion Trilliard 10006+1 10000003.5 1024 Septillion Quadrillion 10007+1 10000004 1027 Octillion Thousand quadrillion Quadrilliard 10008+1 10000004.5 1030 Nonillion Quintillion 10009+1 10000005 1033 Decillion Thousand quintillion Quintilliard 100010+1 10000005.5 1036 Undecillion Sextillion 100011+1 10000006 1039 Duodecillion Thousand sextillion Sextilliard 100012+1 10000006.5 1042 Tredecillion Septillion 100013+1 10000007 1045 Quattuordecillion Thousand septillion Septilliard 100014+1 10000007.5 1048 Quindecillion Octillion 100015+1 10000008 1051 Sexdecillion Thousand octillion Octilliard 100016+1 10000008.5 1054 Septendecillion Nonillion 100017+1 10000009 1057 Octodecillion Thousand nonillion Nonilliard 100018+1 10000009.5 1060 Novemdecillion Decillion 100019+1 100000010 1063 Vigintillion Thousand decillion Decilliard 100020+1 100000010.5 1066 Unvigintillion Undecillion 100021+1 100000011 1069 Duovigintillion Thousand undecillion Undecilliard 100022+1 100000011.5 1072 Trevigintillion Duodecillion 100023+1 100000012 1075 Quattuorvigintillion ... ... 100024+1 100000012.5 ... ... ... ... ... 1093 Trigintillion Thousand quindecillion Quindecilliard 100030+1 100000015.5 ... ... ... ... ... 10120 Novemtrigintillion Vigintillion 100039+1 100000020 10123 Quadragintillion Thousand vigintillion Vigintilliard 100040+1 100000020.5 ... ... ... ... ... 10153 Quinquagintillion Thousand duovigintillion Duovigintilliard 100050+1 100000025.5 ... ... ... ... ... 10180 Novemquinquagintillion Trigintillion 100059+1 100000030 10183 Sexagintillion Thousand trigintillion Trigintilliard 100060+1 100000030.5 ... ... ... ... ... 10213 Septuagintillion Thousand quintrigintillion Quintrigintilliard 100070+1 100000035.5 ... ... ... ... ... 10240 Novemseptuagintillion Quadragintillion 100079+1 100000040 10243 Octogintillion Thousand quadragintillion Quadragintilliard 100080+1 100000040.5 ... ... ... ... ... 10273 Nonagintillion Thousand quinquadragintillion Quinquadragintilliard 100090+1 100000045.5 ... ... ... ... ... 10300 Novemnonagintillion Quinquagintillion 100099+1 100000050 10303 Centillion Thousand quinquagintillion Quinquagintilliard 1000100+1 100000050.5 ... ... ... ... 10360 Sexagintillion 1000119+1 100000060 10420 Septuagintillion 1000139+1 100000070 10480 Octogintillion 1000159+1 100000080 10540 Nonagintillion 1000179+1 100000090 10600 Centillion 1000199+1 1000000100 10603 ducentillion Thousand Centillion Centilliard 1000200+1 1000000100.5 * There is no consistent and widely accepted way to extend cardinals beyond centillion (centilliard). [edit] Proposed systematic names for powers of 10 [edit] Gillion system As proposed by Russ Rowlett, based on Greek-derived numerical prefixes: Value Name 103 Thousand 106 Million 109 Gillion 1012 Tetrillion 1015 Pentillion 1018 Hexillion 1021 Heptillion 1024 Oktillion 1027 Ennillion 1030 Dekillion Value Name 1033 Hendekillion 1036 Dodekillion 1039 Trisdekillion 1042 Tetradekillion 1045 Pentadekillion 1048 Hexadekillion 1051 Heptadekillion 1054 Oktadekillion 1057 Enneadekillion 1060 Icosillion Value Name 1063 Icosihenillion 1066 Icosidillion 1069 Icositrillion 1072 Icositetrillion 1075 Icosipentillion 1078 Icosihexillion 1081 Icosiheptillion 1084 Icosioktillion 1087 Icosiennillion 1090 Triacontillion [edit] Myriad system Proposed by Donald E. Knuth: Value Name Notation 100 One 1 101 Ten 10 102 Hundred 100 103 Ten hundred 1000 104 Myriad 1,0000 105 Ten myriad 10,0000 106 Hundred myriad 100,0000 107 Ten hundred myriad 1000,0000 108 Myllion 1,0000,0000 1012 Myriad myllion 1,0000,0000,0000 1016 Byllion 1,0000,0000,0000,0000 1024 Myllion byllion 1,0000,0000:0000,0000;0000,0000 1032 Tryllion 1 0000,0000;0000,0000:0000,0000;0000,0000 1064 Quadryllion 1'0000,0000;0000,0000:0000,0000;0000,0000 0000,0000;0000,0000:0000,0000;0000,0000 10128 Quintyllion 10256 Sextyllion 10512 Septyllion 101024 Octyllion 102048 Nonyllion 104096 Decyllion 108192 Undecyllion 1016,384 Duodecyllion 1032,768 Tredecyllion 1065,536 Quattuordecyllion 10131,072 Quindecyllion 10262,144 Sexdecyllion 10524,288 Septendecyllion 101,048,576 Octodecyllion 102,097,152 Novemdecyllion 104,194,304 Vigintyllion 104,294,967,296 Trigintyllion {10}^{\,\! 4 * 2^{40}} Ragintyllion {10}^{\,\! 4 * 2^{50}} Quinquagintyllion {10}^{\,\! 4 * 2^{60}} Sexagintyllion {10}^{\,\! 4 * 2^{70}} Septuagintyllion {10}^{\,\! 4 * 2^{80}} Octogintyllion {10}^{\,\! 4 * 2^{90}} Nonagintyllion {10}^{\,\! 4 * 2^{100}} Centyllion {10}^{\,\! 4 * 2^{1000}} Millyllion {10}^{\,\! 4 * 2^{10000}} Myryllion [edit] Googol and others 10100 Googol {10}^{\,\!10^{100}} Googolplex 10-N N-minex 10N N-plex [edit] SI-derived Value SI prefix Name Binary prefix Value 1 000 k Kilo (k) Ki 1024 1 000 000 M Meg (M) Mi 1 048 576 1 000 000 000 G Gig Gi 1 073 741 824 [edit] Fractional numbers This is a table of English names for positive rational numbers less than or equal to 1. It also lists alternative names, but there is no widespread convention for the names of extremely small positive numbers. Keep in mind that rational numbers like 0.12 can be represented in infinitely many ways, e.g. zero-point-one-two (0.12), twelve percent (12%), three twenty-fifths \left({3 \over 25}\right), nine seventy-fifths \left({9 \over 75} \right), six fiftieths \left({6 \over 50}\right), twelve hundredths \left({12 \over 100}\right), twenty-four two-hundredths \left({24 \over 200}\right), etc. Value Fraction Common names Alternative names 1 1 \over 1 One 0.999... 0.9 9 \over 10 Nine tenths, zero point nine 0.8 4 \over 5 Four fifths, eight tenths, zero point eight 0.7 7 \over 10 Seven tenths, zero point seven 0.6 3 \over 5 Three fifths, six tenths, zero point six 0.5 1 \over 2 One half, five tenths, zero point five 0.4 2 \over 5 Two fifths, four tenths, zero point four 0.3 (333 333)... 1 \over 3 One third 0.3 3 \over 10 Three tenths, zero point three 0.25 1 \over 4 One quarter, one fourth, twenty-five hundredths, zero point two five 0.2 1 \over 5 One fifth, two tenths, zero point two 0.16 (666 666)... 1 \over 6 One sixth 0.142 857 (142 857)... 1 \over 7 One seventh 0.125 1 \over 8 One eighth, one-hundred-[and]-twenty-five thousandths, zero point one two five 0.1 (111 111)... 1 \over 9 One ninth 0.1 1 \over 10 One tenth, zero point one One perdecime, one perdime 0.090 (909 090)... 1 \over 11 One eleventh 0.09 9 \over 100 Nine hundredths, zero point zero nine 0.083 (333 333)... 1 \over 12 One twelfth 0.08 2 \over 25 Two twenty-fifths, eight hundredths, zero point zero eight 0.0625 1 \over 16 One sixteenth, six-hundred-[and]-twenty-five ten-thousandths, zero point zero six two five 0.05 1 \over 20 One twentieth, zero point zero five 0.047 619 (047 619)... 1 \over 21 One twenty-first 0.045 (454 545)... 1 \over 22 One twenty-second 0.043 478 260 869 565 217 3913 (043 478)... 1 \over 23 One twenty-third 0.03 (333 333)... 1 \over 30 One thirtieth 0.016 (666 666)... 1 \over 60 One sixtieth One minute 0.012345679 (012345679) 1 \over 81 One eighty-first 0.01 1 \over 100 One hundredth, zero point zero one One percent 0.001 1 \over 1000 One thousandth, zero point zero zero one One permille 0.000 27 (777 777)... 1 \over 3600 One thirty-six hundredth One second 0.000 1 1 \over 10000 One ten-thousandth, zero point zero zero zero one One myriadth, one permyria, one permyriad, one basis point 0.000 01 1 \over 10^5 One hundred-thousandth One lakhth, one perlakh 0.000 001 1 \over 10^6 One millionth One perion, one ppm 0.000 000 1 1 \over 10^7 One ten-millionth One crorth, one percrore 0.000 000 01 1 \over 10^8 One hundred-millionth One awkth, one perawk 0.000 000 001 1 \over 10^9 One billionth (in some dialects) One ppb 0 0 \over 1 Zero [edit] Irrational numbers [edit] Algebraic numbers Expression Value Notes {\sqrt{5} - 1} \over 2 0.618 033 988 749 894 848 204 586 834 366... Golden ratio conjugate \left(\hat\phi\right), reciprocal of and one less than the golden ratio. \sqrt[12]{2} 1.059 463 094 359 295 264 561 825 294 946... Twelfth root of two. Proportion between the frequencies of adjacent semitones in the equal temperament scale. \sqrt[3]{2} 1.259 921 049 894 873 164 767 210 607 278... Cube root of two. Length of the edge of a cube with volume two. See doubling the cube for the significance of this number. \sqrt[3]{\frac{1}{2}+\frac{1}{6}\sqrt{\frac{23}{3}}}+ \sqrt[3]{\frac{1}{2}-\frac{1}{6}\sqrt{\frac{23}{3}}} 1.324 717 957 244 746 025 960 908 854 478... Plastic number. \sqrt{2} 1.414 213 562 373 095 048 801 688 724 210... \sqrt{2} = 2 \sin 45^\circ = 2 \cos 45^\circ Square root of two a.k.a. Pythagoras' constant. Ratio of diagonal to side length in a square. Proportion between the sides of paper sizes in the ISO 216 series (originally DIN 476 series). {\sqrt{5} + 1} \over 2 1.618 033 988 749 894 848 204 586 834 366... Golden ratio \left(\phi\right). \sqrt{3} 1.732 050 807 568 877 193 176 604 123 437... \sqrt{3} = 2 \sin 60^\circ = 2 \cos 30^\circ Square root of three a.k.a. the measure of the fish. Length of the diagonal of a cube with edge length 1. Length of the diagonal of a 1 \times \sqrt{2} rectangle. Altitude of an equilateral triangle with side length 2. Twice the altitude of an equilateral triangle with side length 1. Altitude of a regular hexagon with side length 1 and diagonal length 2. \sqrt{5} 2.236 067 977 499 789 805 051 477 742 381... Square root of five. Length of the diagonal of a 1 \times 2 rectangle. Length of the diagonal of a \sqrt{2} \times \sqrt{3} rectangle. Length of the diagonal of a 1 \times \sqrt{2} \times \sqrt{2} rectangular box. \sqrt{2} + 1 2.414 213 562 373 095 048 801 688 724 210... Silver ratio \left(\delta_S\right). \sqrt{6} 2.449 489 742 783 177 881 335 632 264 381... \sqrt{2} \cdot \sqrt{3} = area of a \sqrt{2} \times \sqrt{3} rectangle. Length of the diagonal of a 1 \times 1 \times 2 rectangular box. Length of the diagonal of a 1 \times \sqrt{5} rectangle. Length of the diagonal of a 2 \times \sqrt{2} rectangle. Length of the diagonal of a \sqrt{3} \times \sqrt{3} rectangle. \sqrt{7} 2.645 751 311 064 590 716 171 096 573 817... Length of the diagonal of a 1 \times 2 \times \sqrt{2} rectangular box. Length of the diagonal of a 1 \times \sqrt{6} rectangle. Length of the diagonal of a 2 \times \sqrt{3} rectangle. Length of the diagonal of a \sqrt{2} \times \sqrt{5} rectangle. \sqrt{8} 2.828 427 124 746 190 290 949 243 717 478... 2 \sqrt{2} Volume of a cube with edge length \sqrt{2}. Length of the diagonal of a 2 \times 2 rectangle. Length of the diagonal of a 1 \times \sqrt{7} rectangle. Length of the diagonal of a \sqrt{2} \times \sqrt{6} rectangle. Length of the diagonal of a \sqrt{3} \times \sqrt{5} rectangle. \sqrt{10} 3.162 277 660 168 379 522 787 063 251 599... \sqrt{2} \cdot \sqrt{5} = area of a \sqrt{2} \times \sqrt{5} rectangle. Length of the diagonal of a 1 \times 3 rectangle. Length of the diagonal of a 2 \times \sqrt{6} rectangle. Length of the diagonal of a \sqrt{3} \times \sqrt{7} rectangle. Length of the diagonal of a \sqrt{5} \times \sqrt{5} rectangle. \sqrt{11} 3.316 624 790 355 399 849 114 932 736 671 Length of the diagonal of a 1 \times 1 \times 3 rectangular box. Length of the diagonal of a 1 \times \sqrt{10} rectangle. Length of the diagonal of a 2 \times \sqrt{7} rectangle. Length of the diagonal of a 3 \times \sqrt{2} rectangle. Length of the diagonal of a \sqrt{3} \times \sqrt{8} rectangle. Length of the diagonal of a \sqrt{5} \times \sqrt{6} rectangle. \sqrt{12} 3.464 101 615 137 754 587 054 892 683 012... 2 \sqrt{3} Length of the diagonal of a cube with edge length 2. Length of the diagonal of a 1 \times \sqrt{11} rectangle. Length of the diagonal of a 2 \times \sqrt{8} rectangle. Length of the diagonal of a 3 \times \sqrt{3} rectangle. Length of the diagonal of a \sqrt{2} \times \sqrt{10} rectangle. Length of the diagonal of a \sqrt{5} \times \sqrt{7} rectangle. Length of the diagonal of a \sqrt{6} \times \sqrt{6} rectangle. [edit] Transcendental numbers * Khinchin-Lévy constant: 1.186 569 110 4...[1] * Napier's constant: e = 2.718 281 828 459 045 235 360 287 471 353 ... * Pi: π = 3.141 592 653 589 793 238 462 643 383 279 ... Suspected transcendentals: * Euler-Mascheroni constant: γ = 0.577 215 664 901 532 860 606 512 090 082 ... * Gauss-Kuzmin-Wirsing constant: 0.303 663 002 9...[2] * Laplace limit: ε=0.662 743 419 3...[3] * Khinchin's constant: 2.685 452 001...[4] * Feigenbaum constants: δ = 4.6692 ... and α = 2.5029 ... [edit] Hypercomplex numbers [edit] Algebraic complex numbers * Imaginary unit: i = \sqrt{-1} [edit] Other hypercomplex numbers * The quaternions * The octonions * The sedenions * The dual numbers (with an infinitesimal) [edit] Transfinite numbers * Infinity in general: \infty * Aleph-null: \aleph_0 * Aleph-one: \aleph_1 * Beth-one: (\beth_1) is the cardinality of the continuum: 2^{\aleph_0} [edit] Numbers representing measured quantities * Pair: 2 (the base of the binary numeral system) * Dozen: 12 (the base of the duodecimal numeral system) * Baker's dozen: 13 * Score: 20 (the base of the vigesimal numeral system) * Gross: 144 (= 122) * Great gross: 1728 (= 123) * Avogadro's number: NA = 6.022... \times 10^{23} [edit] Numbers without specific values See placeholder names [edit] Bases * Base -3 (negaternary) * Base -2 (negabinary) * Base 1 (unary) * Base 2 (binary) * Base 3 (ternary or trinary, see also balanced ternary) * Base 4 (quaternary) * Base 5 (quinary) * Base 6 (senary or heximal) * Base 7 (septenary) * Base 8 (octal) * Base 9 (nonary) * Base 10 (decimal) * Base 12 (duodecimal or dozenal) * Base 13 (tridecimal or tredecimal) * Base 16 (hexadecimal) * Base 20 (vigesimal) * Base 24 (quadrovigesimal) * Base 26 (hexavigesimal) * Base 27 (septemvigesimal) * Base 30 (trigesimal) * Base 32 (duotrigesimal) * Base 36 (hexatridecimal, sexatrigesimal or hexatrigesimal) * Base 60 (sexagesimal) * Base 64 (quadrosexagesimal) * mixed radix * Base φ (phinary) * Base 2i (quater-imaginary) See also positional systems of numeral system for bases which might not be listed here. [edit] See also * English-language numerals * Numbers in various languages * Floating point * Fraction (mathematics) * Interesting number paradox * Large number * List of prime numbers * Mathematical constant * Names of large numbers * Negative number * Number names * Orders of magnitude (numbers) * Ordinal number * SI prefix * Small number * Surreal number * Table of prime factors [edit] Further reading * Kingdom of Infinite Number: A Field Guide by Bryan Bunch, W.H. Freeman & Company, 2001. ISBN 0-7167-4447-3 [edit] External links * What's Special About This Number? A Zoology of Numbers: from 0 to 500 * A list of unusual properties for many of the first 1000 natural numbers (this list contains several important errors!) * See how to write big numbers * The MegaPenny Project - Visualizing big numbers * About big numbers * Robert P. Munafo's amazing Large Numbers page * Different notations for big numbers - by Susan Stepney * Names for Large Numbers, in How Many? 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