81913631040

Names of 81913631040

• Cardinal: 81913631040 can be written as Eighty-one billion, nine hundred thirteen million, six hundred thirty-one thousand and forty.

Scientific notation

• Scientific notation: 8.191363104 × 10¹⁰

Factors of 81913631040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 18837

Divisors of 81913631040

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 37 40 41 45 48 60 64 72 74 80 82 90 96 111 120 123 144 148 160 164 180 185 192 205 222 240 246 288 296 320 328 333 360 369 370 410 444 480 492 555 576 592 615 656 666 720 738 740 820 888 960 984 1110 1184 1230 1312 1332 1440 1476 1480 1517 1640 1665 1776 1845 1968 2220 2368 2460 2624 2664 2880 2952 2960 3034 3280 3330 3552 3690 3936 4440 4551 4920 5328 5904 5920 6068 6560 6660 7104 7380 7585 7872 8880 9102 9840 10656 11808 11840 12136 13120 13320 13653 14760 15170 17760 18204 18749 19680 21312 22755 23616 24272 26640 27306 29520 30340 35520 36408 37498 39360 45510 48544 53280 54612 56247 59040 60680 68265 72816 74996 91020 93745 97088 106560 109224 112494 118080 121360 136530 145632 149992 168741 182040 187490 218448 224988 242720 273060 281235 291264 299984 337482 364080 374980 436896 449976 485440 546120 562470 599968 674964 693713 728160 749960 768709 843705 873792 899952 1092240 1124940 1199936 1349928 1387426 1456320 1499920 1537418 1687410 1799904 2081139 2184480 2249880 2306127 2699856 2774852 2999840 3074836 3374820 3468565 3599808 3843545 4162278 4368960 4499760 4612254 5399712 5549704 5999680 6149672 6243417 6749640 6918381 6937130 7687090 8324556 8999520 9224508 10405695 10799424 11099408 11530635 12299344 12486834 13499280 13836762 13874260 15374180 16649112 17999040 18449016 20811390 22198816 23061270 24598688 24973668 26998560 27673524 27748520 28442233 30748360 31217085 33298224 34591905 36898032 41622780 44397632 46122540 49197376 49947336 53997120 55347048 55497040 56884466 61496720 62434170 66596448 69183810 73796064 83245560 85326699 92245080 99894672 110694096 110994080 113768932 122993440 124868340 133192896 138367620 142211165 147592128 166491120 170653398 184490160 199789344 221388192 221988160 227537864 245986880 249736680 255980097 276735240 284422330 332982240 341306796 368980320 399578688 426633495 442776384 455075728 499473360 511960194 553470480 568844660 665964480 682613592 737960640 853266990 910151456 998946720 1023920388 1106940960 1137689320 1279900485 1365227184 1706533980 1820302912 1997893440 2047840776 2213881920 2275378640 2559800970 2730454368 3413067960 4095681552 4550757280 5119601940 5460908736 6826135920 8191363104 9101514560 10239203880 13652271840 16382726208 20478407760 27304543680 40956815520 81913631040
• Sum of all divisors σ(n): 296437050000
• Sum of proper divisors (its aliquot sum) s(n): 214523418960
• 81913631040 is an abundant number, because the sum of its proper divisors (214523418960) is greater than itself. Its abundance is 132609787920

Bases of 81913631040

• Binary: 1001100010010011011101101000101000000₂
• Hexadecimal: 0x13126ED140
• Base-36: 11MP9E80

Squares and roots of 81913631040

• 81913631040 squared (81913631040²) is 6709842950157251481600
• 81913631040 cubed (81913631040³) is 549627599755526207844275748864000
• The square root of 81913631040 is 286205.5747884727
• The cube root of 81913631040 is 4342.9556314395

Scales and comparisons

• 81,913,631,040 seconds is equal to 2,604 years, 31 weeks, 1 day, 10 hours, 24 minutes.
• To count from 1 to 81,913,631,040 would take you about five thousand, two hundred nine 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 81913631040 cubic inches would be around 361.9 feet tall.

Recreational maths with 81913631040

• 81913631040 backwards is 04013631918
• 81913631040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81913631040's digits is 36
• More coming soon!