81813916512

Names of 81813916512

• Cardinal: 81813916512 can be written as Eighty-one billion, eight hundred thirteen million, nine hundred sixteen thousand, five hundred twelve.

Scientific notation

• Scientific notation: 8.1813916512 × 10¹⁰

Factors of 81813916512

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 688

Divisors of 81813916512

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 72 81 96 108 144 149 162 216 241 243 288 293 298 324 432 447 482 486 586 596 648 723 864 879 894 964 972 1172 1192 1296 1341 1446 1758 1788 1928 1944 2169 2344 2384 2592 2637 2682 2892 3516 3576 3856 3888 4023 4338 4688 4768 5274 5364 5784 6507 7032 7152 7712 7776 7911 8046 8676 9376 10548 10728 11568 12069 13014 14064 14304 15822 16092 17352 19521 21096 21456 23136 23733 24138 26028 28128 31644 32184 34704 35909 36207 39042 42192 42912 43657 47466 48276 52056 58563 63288 64368 69408 70613 71199 71818 72414 78084 84384 87314 94932 96552 104112 107727 117126 126576 128736 130971 141226 142398 143636 144828 156168 174628 189864 193104 208224 211839 215454 234252 253152 261942 282452 284796 287272 289656 312336 323181 349256 379728 386208 392913 423678 430908 468504 523884 564904 569592 574544 579312 624672 635517 646362 698512 759456 785826 847356 861816 937008 969543 1047768 1129808 1139184 1149088 1158624 1178739 1271034 1292724 1397024 1571652 1694712 1723632 1874016 1906551 1939086 2095536 2259616 2278368 2357478 2542068 2585448 2908629 3143304 3389424 3447264 3536217 3813102 3878172 4191072 4714956 5084136 5170896 5719653 5817258 6286608 6778848 7072434 7626204 7756344 8725887 9429912 10168272 10341792 10521337 10608651 11439306 11634516 12573216 14144868 15252408 15512688 17158959 17451774 18859824 20336544 21042674 21217302 22878612 23269032 28289736 30504816 31025376 31564011 34317918 34903548 37719648 42085348 42434604 45757224 46538064 56579472 61009632 63128022 68635836 69807096 84170696 84869208 91514448 93076128 94692033 113158944 126256044 137271672 139614192 168341392 169738416 183028896 189384066 252512088 274543344 279228384 284076099 336682784 339476832 378768132 505024176 549086688 568152198 757536264 852228297 1010048352 1136304396 1515072528 1704456594 2272608792 2556684891 3030145056 3408913188 4545217584 5113369782 6817826376 9090435168 10226739564 13635652752 20453479128 27271305504 40906958256 81813916512
• Sum of all divisors σ(n): 244734890400
• Sum of proper divisors (its aliquot sum) s(n): 162920973888
• 81813916512 is an abundant number, because the sum of its proper divisors (162920973888) is greater than itself. Its abundance is 81107057376

Bases of 81813916512

• Binary: 1001100001100011111010100101101100000₂
• Hexadecimal: 0x130C7D4B60
• Base-36: 11L1W600

Squares and roots of 81813916512

• 81813916512 squared (81813916512²) is 6693516935032506246144
• 81813916512 cubed (81813916512³) is 547622835694407594028143737929728
• The square root of 81813916512 is 286031.3208583983
• The cube root of 81813916512 is 4341.1926704369

Scales and comparisons

• 81,813,916,512 seconds is equal to 2,601 years, 22 weeks, 2 days, 7 hours, 55 minutes, 12 seconds.
• To count from 1 to 81,813,916,512 would take you about five thousand, two hundred two 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 81813916512 cubic inches would be around 361.8 feet tall.

Recreational maths with 81813916512

• 81813916512 backwards is 21561931818
• The number of decimal digits it has is: 11
• The sum of 81813916512's digits is 45
• More coming soon!