81631918368

Names of 81631918368

• Cardinal: 81631918368 can be written as Eighty-one billion, six hundred thirty-one million, nine hundred eighteen thousand, three hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1631918368 × 10¹⁰

Factors of 81631918368

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2624

Divisors of 81631918368

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 6 7 8 9 11 12 13 14 16 18 21 22 24 26 27 28 32 33 36 37 39 42 44 48 52 54 56 63 66 72 74 77 78 84 88 91 96 99 104 108 111 112 117 126 132 143 144 148 154 156 168 176 182 189 198 208 216 222 224 231 234 252 259 264 273 286 288 296 297 308 312 333 336 351 352 364 378 396 407 416 429 432 444 462 468 481 504 518 528 546 572 592 594 616 624 666 672 693 702 728 756 777 792 814 819 858 864 888 924 936 962 999 1001 1008 1036 1056 1092 1144 1184 1188 1221 1232 1248 1287 1332 1386 1404 1443 1456 1512 1554 1584 1628 1638 1716 1776 1848 1872 1924 1998 2002 2016 2072 2079 2184 2288 2331 2376 2442 2457 2464 2551 2574 2664 2772 2808 2849 2886 2912 3003 3024 3108 3168 3256 3276 3367 3432 3552 3663 3696 3744 3848 3861 3996 4004 4144 4158 4329 4368 4576 4662 4752 4884 4914 5102 5148 5291 5328 5544 5616 5698 5772 6006 6048 6216 6512 6552 6734 6864 6993 7326 7392 7653 7696 7722 7992 8008 8288 8316 8547 8658 8736 9009 9324 9504 9768 9828 10101 10204 10296 10582 10656 10989 11088 11232 11396 11544 12012 12432 12987 13024 13104 13468 13728 13986 14652 15306 15392 15444 15873 15984 16016 16632 17094 17316 17857 18018 18648 19536 19656 20202 20408 20592 21164 21978 22176 22792 22959 23088 24024 24864 25641 25974 26208 26936 27027 27972 28061 29304 30303 30612 30888 31746 31968 32032 33163 33264 34188 34632 35714 36036 37037 37296 39072 39312 40404 40816 41184 42328 43956 45584 45918 46176 47619 48048 51282 51948 53571 53872 54054 55944 56122 58608 60606 61224 61776 63492 66326 66528 68376 68877 69264 71428 72072 74074 74592 76923 78624 80808 81632 84183 84656 87912 90909 91168 91836 94387 95238 96096 99489 102564 103896 107142 107744 108108 111111 111888 112244 117216 121212 122448 123552 126984 132652 136752 137754 138528 142856 142857 144144 148148 153846 160713 161616 168366 169312 175824 181818 183672 188774 190476 196427 198978 205128 207792 214284 216216 222222 223776 224488 232141 242424 244896 252549 253968 265304 273504 275508 283161 285712 285714 288288 296296 298467 307692 321426 323232 333333 336732 351648 363636 364793 367344 377548 380952 392854 397956 410256 415584 428568 432432 444444 448976 464282 482139 484848 505098 507936 530608 551016 566322 571424 571428 589281 592592 596934 615384 642852 660709 666666 673464 696423 727272 729586 734688 755096 757647 761904 785708 795912 820512 849483 857136 864864 888888 895401 897952 928564 964278 969696 999999 1010196 1038257 1061216 1094379 1102032 1132644 1142856 1178562 1185184 1193868 1227031 1230768 1285704 1321418 1333332 1346928 1392846 1454544 1459172 1510192 1515294 1523808 1571416 1591824 1698966 1714272 1767843 1777776 1790802 1857128 1928556 1982127 1999998 2020392 2076514 2089269 2188758 2204064 2265288 2285712 2357124 2387736 2454062 2461536 2548449 2553551 2571408 2642836 2666664 2693856 2785692 2909088 2918344 3020384 3030588 3114771 3142832 3183648 3283137 3397932 3535686 3555552 3581604 3681093 3714256 3857112 3964254 3999996 4040784 4153028 4178538 4377516 4530576 4571424 4714248 4775472 4908124 5096898 5107102 5142816 5285672 5303529 5333328 5571384 5836688 5946381 6061176 6229542 6267807 6285664 6566274 6795864 7071372 7163208 7267799 7362186 7428512 7660653 7714224 7928508 7999992 8081568 8306056 8357076 8589217 8755032 9061152 9344313 9428496 9550944 9816248 9849411 10193796 10214204 10571344 10607058 10666656 11043279 11142768 11673376 11892762 12122352 12459084 12535614 13132548 13497341 13591728 14142744 14326416 14535598 14724372 15321306 15428448 15857016 15999984 16612112 16714152 17178434 17510064 17839143 18688626 18856992 19632496 19698822 20387592 20428408 21142688 21214116 21803397 22086558 22285536 22981959 23785524 24244704 24918168 25071228 25767651 26265096 26994682 27183456 28032939 28285488 28652832 29071196 29448744 30642612 31714032 31999968 33129837 33224224 33428304 34356868 35020128 35678286 37377252 39264992 39397644 40492023 40775184 40856816 42428232 43606794 44173116 45963918 47571048 49836336 50142456 51535302 52530192 53989364 56065878 56570976 58142392 58897488 61285224 63428064 65410191 66259674 66856608 68713736 68945877 71356572 74754504 77302953 78795288 80984046 81550368 81713632 84856464 87213588 88346232 91927836 94481387 95142096 99672672 100284912 103070604 105060384 107978728 112131756 116284784 117794976 121476069 122570448 130820382 132519348 137427472 137891754 142713144 149509008 154605906 157590576 161968092 169712928 174427176 176692464 183855672 188962774 190284192 196230573 200569824 206141208 215957456 224263512 231908859 232569568 242952138 245140896 261640764 265038696 274854944 275783508 283444161 285426288 299018016 309211812 315181152 323936184 348854352 353384928 364428207 367711344 377925548 392461146 412282416 431914912 448527024 463817718 485904276 523281528 530077392 551567016 566888322 570852576 618423624 647872368 697708704 728856414 735422688 755851096 784922292 824564832 850332483 897054048 927635436 971808552 1046563056 1060154784 1103134032 1133776644 1236847248 1295744736 1457712828 1511702192 1569844584 1700664966 1855270872 1943617104 2093126112 2206268064 2267553288 2473694496 2550997449 2915425656 3023404384 3139689168 3401329932 3710541744 3887234208 4535106576 5101994898 5830851312 6279378336 6802659864 7421083488 9070213152 10203989796 11661702624 13605319728 20407979592 27210639456 40815959184 81631918368
• Sum of all divisors σ(n): 328446074880
• Sum of proper divisors (its aliquot sum) s(n): 246814156512
• 81631918368 is an abundant number, because the sum of its proper divisors (246814156512) is greater than itself. Its abundance is 165182238144

Bases of 81631918368

• Binary: 1001100000001101001000011100100100000₂
• Hexadecimal: 0x1301A43920
• Base-36: 11I1JBC0

Squares and roots of 81631918368

• 81631918368 squared (81631918368²) is 6663770096439815783424
• 81631918368 cubed (81631918368³) is 543976336535694529457425935532032
• The square root of 81631918368 is 285712.9999982499
• The cube root of 81631918368 is 4337.9712315565

Scales and comparisons

• 81,631,918,368 seconds is equal to 2,595 years, 33 weeks, 2 days, 20 hours, 52 minutes, 48 seconds.
• To count from 1 to 81,631,918,368 would take you about five thousand, one hundred ninety-one 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 81631918368 cubic inches would be around 361.5 feet tall.

Recreational maths with 81631918368

• 81631918368 backwards is 86381913618
• 81631918368 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81631918368's digits is 54
• More coming soon!