81731054160

Names of 81731054160

• Cardinal: 81731054160 can be written as Eighty-one billion, seven hundred thirty-one million, fifty-four thousand, one hundred sixty.

Scientific notation

• Scientific notation: 8.173105416 × 10¹⁰

Factors of 81731054160

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 26977

Divisors of 81731054160

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 35 36 40 42 45 48 54 56 60 63 67 70 72 80 81 84 90 105 108 112 120 126 134 135 140 144 162 168 180 189 201 210 216 240 252 268 270 280 315 324 335 336 360 378 402 405 420 432 469 504 536 540 560 567 603 630 648 670 720 756 804 810 840 938 945 1005 1008 1072 1080 1134 1206 1260 1296 1340 1407 1512 1608 1620 1680 1809 1876 1890 2010 2160 2268 2345 2412 2520 2680 2814 2835 3015 3024 3216 3240 3618 3752 3780 4020 4221 4536 4690 4824 5040 5360 5427 5628 5670 6030 6480 7035 7236 7504 7560 8040 8442 9045 9072 9380 9648 10854 11256 11340 12060 12663 14070 14472 15120 16080 16884 18090 18760 21105 21708 22512 22680 24120 25326 26893 27135 28140 28944 33768 36180 37520 37989 42210 43416 45360 48240 50652 53786 54270 56280 63315 67536 72360 75978 80679 84420 86832 101304 107572 108540 112560 126630 134465 144720 151956 161358 168840 188251 189945 202608 215144 217080 242037 253260 268930 303912 322716 337680 376502 379890 403395 430288 434160 484074 506520 537860 564753 607824 645432 726111 753004 759780 806790 941255 968148 1013040 1075720 1129506 1210185 1290864 1452222 1506008 1519560 1613580 1694259 1801831 1882510 1936296 2151440 2178333 2259012 2420370 2823765 2904444 3012016 3039120 3227160 3388518 3603662 3630555 3765020 3872592 4356666 4518024 4840740 5082777 5405493 5647530 5808888 6454320 6777036 7207324 7261110 7530040 8471295 8713332 9009155 9036048 9681480 10165554 10810986 10891665 11295060 11617776 12612817 13554072 14414648 14522220 15060080 15248331 16216479 16942590 17426664 18018310 19362960 20331108 21621972 21783330 22590120 25225634 25413885 27027465 27108144 28829296 29044440 30496662 32432958 33885180 34853328 36036620 37838451 40662216 43243944 43566660 45180240 48649437 50451268 50827770 54054930 58088880 60993324 63064085 64865916 67770360 72073240 75676902 76241655 81082395 81324432 86487888 87133320 97298874 100902536 101655540 108109860 113515353 121986648 126128170 129731832 135540720 144146480 145948311 151353804 152483310 162164790 174266640 189192255 194597748 201805072 203311080 216219720 227030706 243247185 243973296 252256340 259463664 291896622 302707608 304966620 324329580 340546059 378384510 389195496 406622160 432439440 454061412 486494370 504512680 567576765 583793244 605415216 609933240 648659160 681092118 729741555 756769020 778390992 908122824 972988740 1009025360 1021638177 1135153530 1167586488 1219866480 1297318320 1362184236 1459483110 1513538040 1702730295 1816245648 1945977480 2043276354 2270307060 2335172976 2724368472 2918966220 3027076080 3405460590 3891954960 4086552708 4540614120 5108190885 5448736944 5837932440 6810921180 8173105416 9081228240 10216381770 11675864880 13621842360 16346210832 20432763540 27243684720 40865527080 81731054160
• Sum of all divisors σ(n): 329270342016
• Sum of proper divisors (its aliquot sum) s(n): 247539287856
• 81731054160 is an abundant number, because the sum of its proper divisors (247539287856) is greater than itself. Its abundance is 165808233696

Bases of 81731054160

• Binary: 1001100000111100011001110101001010000₂
• Hexadecimal: 0x13078CEA50
• Base-36: 11JOK500

Squares and roots of 81731054160

• 81731054160 squared (81731054160²) is 6679965214104853305600
• 81731054160 cubed (81731054160³) is 545960598700919761438848631296000
• The square root of 81731054160 is 285886.4357747671
• The cube root of 81731054160 is 4339.7265671843

Scales and comparisons

• 81,731,054,160 seconds is equal to 2,598 years, 41 weeks, 2 days, 6 hours, 36 minutes.
• To count from 1 to 81,731,054,160 would take you about five thousand, one hundred ninety-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 81731054160 cubic inches would be around 361.6 feet tall.

Recreational maths with 81731054160

• 81731054160 backwards is 06145013718
• 81731054160 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81731054160's digits is 36
• More coming soon!