81564810327

Names of 81564810327

• Cardinal: 81564810327 can be written as Eighty-one billion, five hundred sixty-four million, eight hundred ten thousand, three hundred twenty-seven.

Scientific notation

• Scientific notation: 8.1564810327 × 10¹⁰

Factors of 81564810327

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 250

Divisors of 81564810327

• Number of divisors d(n): 240
• Complete list of divisors:
  1 3 7 9 11 13 21 27 33 39 63 77 81 89 91 99 117 127 143 189 231 267 273 297 351 381 429 567 623 693 801 819 889 891 979 1001 1053 1143 1157 1287 1397 1651 1869 2079 2403 2457 2667 2937 3003 3429 3471 3861 4191 4953 5607 6237 6853 7209 7371 7921 8001 8099 8811 9009 9779 10287 10413 11303 11557 11583 12573 12727 14859 16821 18161 20559 23763 24003 24297 26433 27027 29337 31239 33909 34671 37719 38181 44577 50463 54483 55447 61677 71289 72009 72891 79121 79299 81081 87131 88011 89089 93717 101727 102973 104013 113157 114543 124333 127127 133731 146939 163449 166341 185031 213867 218673 237363 261393 264033 267267 305181 308919 312039 343629 372999 381381 440817 490347 499023 555093 609917 641601 656019 712089 720811 784179 792099 801801 870331 915543 926757 936117 1005967 1028573 1030887 1118997 1132703 1144143 1322451 1471041 1497069 1616329 1829751 2136267 2162433 2352537 2405403 2610993 2780271 3017901 3085719 3356991 3398109 3432429 3967353 4491207 4848987 5489253 6408801 6487299 7041769 7057611 7216209 7832979 7928921 8340813 9053703 9257157 10070973 10194327 10297287 11065637 11314303 11902059 13077571 14546961 16467759 19461897 21125307 23498937 23786763 27161109 27771471 30582981 33196911 33942909 39232713 43640883 49403277 58385691 63375921 70496811 71360289 77459459 81483327 83314413 91542997 91748943 99590733 101828727 117698139 130922649 143853281 190127763 214080867 232378377 274628991 298772199 305486181 353094417 431559843 570383289 642242601 697135131 823886973 896316597 916458543 1006972967 1059283251 1294679529 2091405393 2471660919 3020918901 3884038587 6274216179 7414982757 9062756703 11652115761 27188270109 81564810327
• Sum of all divisors σ(n): 166755950592
• Sum of proper divisors (its aliquot sum) s(n): 85191140265
• 81564810327 is an abundant number, because the sum of its proper divisors (85191140265) is greater than itself. Its abundance is 3626329938

Bases of 81564810327

• Binary: 1001011111101101001000011110001010111₂
• Hexadecimal: 0x12FDA43C57
• Base-36: 11GXKYFR

Squares and roots of 81564810327

• 81564810327 squared (81564810327²) is 6652818283679485846929
• 81564810327 cubed (81564810327³) is 542635861448314942765644840435783
• The square root of 81564810327 is 285595.5362518821
• The cube root of 81564810327 is 4336.7821845665

Scales and comparisons

• 81,564,810,327 seconds is equal to 2,593 years, 26 weeks, 3 days, 3 hours, 45 minutes, 27 seconds.
• To count from 1 to 81,564,810,327 would take you about five thousand, one hundred eighty-seven years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81564810327 cubic inches would be around 361.4 feet tall.

Recreational maths with 81564810327

• 81564810327 backwards is 72301846518
• The number of decimal digits it has is: 11
• The sum of 81564810327's digits is 45
• More coming soon!