81990099072

Names of 81990099072

• Cardinal: 81990099072 can be written as Eighty-one billion, nine hundred ninety million, ninety-nine thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1990099072 × 10¹⁰

Factors of 81990099072

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 2016

Divisors of 81990099072

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 49 54 56 63 64 72 84 96 98 108 112 126 128 144 147 168 189 192 196 216 224 252 281 288 294 336 378 384 392 432 441 448 504 562 576 588 672 756 784 843 864 882 896 1008 1124 1152 1176 1323 1344 1512 1568 1686 1723 1728 1764 1967 2016 2248 2352 2529 2646 2688 3024 3136 3372 3446 3456 3528 3934 4032 4496 4704 5058 5169 5292 5901 6048 6272 6744 6892 7056 7587 7868 8064 8992 9408 10116 10338 10584 11802 12061 12096 13488 13769 13784 14112 15174 15507 15736 17703 17984 18816 20232 20676 21168 23604 24122 24192 26976 27538 27568 28224 30348 31014 31472 35406 35968 36183 40464 41307 41352 42336 46521 47208 48244 53109 53952 55076 55136 56448 60696 62028 62944 70812 72366 80928 82614 82704 84427 84672 93042 94416 96488 106218 107904 108549 110152 110272 121392 123921 124056 125888 141624 144732 161856 165228 165408 168854 169344 186084 188832 192976 212436 217098 220304 220544 242784 247842 248112 251776 253281 283248 289464 323712 325647 330456 330816 337708 371763 372168 377664 385952 424872 434196 440608 484163 485568 495684 496224 506562 566496 578928 651294 660912 661632 675416 743526 744336 755328 759843 771904 849744 868392 881216 968326 971136 991368 992448 1013124 1132992 1157856 1302588 1321824 1350832 1452489 1487052 1488672 1519686 1543808 1699488 1736784 1762432 1936652 1982736 1984896 2026248 2265984 2279529 2315712 2605176 2643648 2701664 2904978 2974104 2977344 3039372 3389141 3398976 3473568 3873304 3965472 4052496 4357467 4559058 4631424 5210352 5287296 5403328 5809956 5948208 5954688 6078744 6778282 6797952 6947136 7746608 7930944 8104992 8714934 9118116 10167423 10420704 10806656 11619912 11896416 12157488 13072401 13556564 13894272 15493216 15861888 16209984 17429868 18236232 20334846 20841408 23239824 23723987 23792832 24314976 26144802 27113128 30502269 30986432 32419968 34859736 36472464 40669692 41682816 46479648 47447974 47585664 48629952 52289604 54226256 61004538 61972864 69719472 71171961 72944928 81339384 91506807 92959296 94895948 97259904 104579208 108452512 122009076 139438944 142343922 145889856 162678768 183013614 185918592 189791896 209158416 213515883 216905024 244018152 278877888 284687844 291779712 325357536 366027228 379583792 418316832 427031766 433810048 488036304 557755776 569375688 640547649 650715072 732054456 759167584 836633664 854063532 976072608 1138751376 1281095298 1301430144 1464108912 1518335168 1673267328 1708127064 1952145216 2277502752 2562190596 2928217824 3036670336 3416254128 3904290432 4555005504 5124381192 5856435648 6832508256 9110011008 10248762384 11712871296 13665016512 20497524768 27330033024 40995049536 81990099072
• Sum of all divisors σ(n): 282658075200
• Sum of proper divisors (its aliquot sum) s(n): 200667976128
• 81990099072 is an abundant number, because the sum of its proper divisors (200667976128) is greater than itself. Its abundance is 118677877056

Bases of 81990099072

• Binary: 1001100010110111111011010000010000000₂
• Hexadecimal: 0x1316FDA080
• Base-36: 11NYSDC0

Squares and roots of 81990099072

• 81990099072 squared (81990099072²) is 6722376345836375261184
• 81990099072 cubed (81990099072³) is 551168302594393742365846036021248
• The square root of 81990099072 is 286339.1329734725
• The cube root of 81990099072 is 4344.3066234527

Scales and comparisons

• 81,990,099,072 seconds is equal to 2,607 years, 1 week, 4 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,990,099,072 would take you about five thousand, two hundred fourteen 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 81990099072 cubic inches would be around 362 feet tall.

Recreational maths with 81990099072

• 81990099072 backwards is 27099009918
• 81990099072 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81990099072's digits is 54
• More coming soon!