81397578080

Names of 81397578080

• Cardinal: 81397578080 can be written as Eighty-one billion, three hundred ninety-seven million, five hundred seventy-eight thousand and eighty.

Scientific notation

• Scientific notation: 8.139757808 × 10¹⁰

Factors of 81397578080

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 730

Divisors of 81397578080

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 53 56 65 70 80 91 104 106 112 130 140 160 182 208 212 224 260 265 280 313 337 364 371 416 424 455 520 530 560 626 674 689 728 742 848 910 1040 1060 1120 1252 1348 1378 1456 1484 1565 1685 1696 1820 1855 2080 2120 2191 2359 2504 2696 2756 2912 2968 3130 3370 3445 3640 3710 4069 4240 4381 4382 4718 4823 5008 5392 5512 5936 6260 6740 6890 7280 7420 8138 8480 8762 8764 9436 9646 10016 10784 10955 11024 11795 11872 12520 13480 13780 14560 14840 16276 16589 17524 17528 17861 18872 19292 20345 21905 21910 22048 23590 24115 25040 26960 27560 28483 29680 30667 32552 33178 35048 35056 35722 37744 38584 40690 43810 43820 47180 48230 50080 53920 55120 56966 59360 61334 65104 66356 70096 70112 71444 75488 77168 81380 82945 87620 87640 89305 94360 96460 105481 110240 113932 116123 122668 125027 130208 132712 140192 142415 142888 153335 154336 162760 165890 175240 175280 178610 188720 192920 210962 215657 227864 232193 232246 245336 250054 265424 284830 285776 306670 325520 331780 350480 350560 357220 377440 385840 421924 431314 455728 464386 464492 490672 500108 527405 530848 569660 571552 580615 613340 625135 651040 663560 700960 714440 738367 771680 843848 862628 911456 928772 928984 981344 1000216 1054810 1078285 1139320 1160965 1161230 1226680 1250270 1327120 1371253 1428880 1476734 1509599 1625351 1687696 1725256 1857544 1857968 2000432 2109620 2156570 2278640 2321930 2322460 2453360 2500540 2654240 2742506 2857760 2953468 3019198 3250702 3375392 3450512 3691835 3715088 3715936 4000864 4219240 4313140 4557280 4643860 4644920 4906720 5001080 5485012 5590493 5906936 6038396 6501404 6856265 6901024 7383670 7430176 7547995 8126755 8438480 8626280 9287720 9289840 9598771 10002160 10970024 11180986 11813872 12076792 13002808 13712530 14767340 15095990 16253510 16876960 17252560 18575440 18579680 19197542 20004320 21940048 22361972 23627744 24153584 26005616 27425060 27952465 29534680 30191980 32507020 34505120 37150880 38395084 39133451 43880096 44723944 47993855 48307168 52011232 54850120 55904930 59069360 60383960 65014040 72676409 76790168 78266902 89447888 95987710 109700240 111809860 118138720 120767920 130028080 145352818 153580336 156533804 178895776 191975420 195667255 219400480 223619720 241535840 260056160 290705636 307160672 313067608 363382045 383950840 391334510 447239440 508734863 581411272 626135216 726764090 767901680 782669020 894478880 1017469726 1162822544 1252270432 1453528180 1535803360 1565338040 2034939452 2325645088 2543674315 2907056360 3130676080 4069878904 5087348630 5814112720 6261352160 8139757808 10174697260 11628225440 16279515616 20349394520 40698789040 81397578080
• Sum of all divisors σ(n): 242633035008
• Sum of proper divisors (its aliquot sum) s(n): 161235456928
• 81397578080 is an abundant number, because the sum of its proper divisors (161235456928) is greater than itself. Its abundance is 79837878848

Bases of 81397578080

• Binary: 1001011110011101011000111100101100000₂
• Hexadecimal: 0x12F3AC7960
• Base-36: 11E60L7K

Squares and roots of 81397578080

• 81397578080 squared (81397578080²) is 6625565717289696486400
• 81397578080 cubed (81397578080³) is 539305002797259275731245658112000
• The square root of 81397578080 is 285302.6079095667
• The cube root of 81397578080 is 4333.8162566065

Scales and comparisons

• 81,397,578,080 seconds is equal to 2,588 years, 9 weeks, 6 days, 14 hours, 21 minutes, 20 seconds.
• To count from 1 to 81,397,578,080 would take you about five thousand, one hundred seventy-six 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 81397578080 cubic inches would be around 361.2 feet tall.

Recreational maths with 81397578080

• 81397578080 backwards is 08087579318
• 81397578080 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81397578080's digits is 56
• More coming soon!