81438859008

Names of 81438859008

• Cardinal: 81438859008 can be written as Eighty-one billion, four hundred thirty-eight million, eight hundred fifty-nine thousand and eight.

Scientific notation

• Scientific notation: 8.1438859008 × 10¹⁰

Factors of 81438859008

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 819

Divisors of 81438859008

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 31 32 36 39 48 52 62 64 72 78 93 96 104 117 124 128 139 144 156 186 192 208 234 248 256 278 279 288 312 372 384 403 416 417 468 496 556 558 576 624 631 744 768 806 832 834 936 992 1112 1116 1152 1209 1248 1251 1262 1488 1612 1664 1668 1807 1872 1893 1984 2224 2232 2304 2418 2496 2502 2524 2976 3224 3328 3336 3614 3627 3744 3786 3968 4309 4448 4464 4836 4992 5004 5048 5421 5679 5952 6448 6672 7228 7254 7488 7572 7936 8203 8618 8896 8928 9672 9984 10008 10096 10842 11358 11904 12896 12927 13344 14456 14508 14976 15144 16263 16406 17236 17792 17856 19344 19561 20016 20192 21684 22716 23808 24609 25792 25854 26688 28912 29016 29952 30288 32526 32812 34472 35584 35712 38688 38781 39122 40032 40384 43368 45432 49218 51584 51708 53376 56017 57824 58032 58683 60576 65052 65624 68944 71424 73827 77376 77562 78244 80064 80768 86736 87709 90864 98436 103168 103416 106752 112034 115648 116064 117366 121152 130104 131248 137888 147654 154752 155124 156488 160128 161536 168051 173472 175418 176049 181728 196872 206832 224068 231296 232128 234732 242304 254293 260208 262496 263127 275776 295308 309504 310248 312976 320256 336102 346944 350836 352098 363456 393744 413664 448136 462592 464256 469464 484608 504153 508586 520416 524992 526254 551552 590616 620496 625952 672204 693888 701672 704196 726912 762879 787488 789381 827328 896272 928512 938928 1008306 1017172 1040832 1049984 1052508 1103104 1140217 1181232 1240992 1251904 1344408 1387776 1403344 1408392 1453824 1525758 1574976 1578762 1654656 1792544 1877856 2016612 2034344 2081664 2099968 2105016 2280434 2288637 2362464 2481984 2503808 2688816 2718979 2806688 2816784 3051516 3149952 3157524 3309312 3420651 3585088 3755712 4033224 4068688 4163328 4210032 4560868 4577274 4724928 4963968 5007616 5377632 5437958 5613376 5633568 6103032 6299904 6315048 6841302 7170176 7511424 8066448 8137376 8156937 8420064 9121736 9154548 9449856 9927936 10261953 10755264 10875916 11226752 11267136 12206064 12630096 13682604 14340352 15022848 16132896 16274752 16313874 16840128 18243472 18309096 18899712 20523906 21510528 21751832 22453504 22534272 24412128 24470811 25260192 27365208 32265792 32549504 32627748 33680256 35346727 36486944 36618192 41047812 43021056 43503664 45068544 48824256 48941622 50520384 54730416 64531584 65099008 65255496 67360512 70693454 72973888 73236384 82095624 87007328 97648512 97883244 101040768 106040181 109460832 129063168 130510992 141386908 145947776 146472768 164191248 174014656 195297024 195766488 202081536 212080362 218921664 261021984 282773816 291895552 292945536 318120543 328382496 348029312 391532976 424160724 437843328 522043968 565547632 585891072 636241086 656764992 696058624 783065952 848321448 875686656 1044087936 1131095264 1272482172 1313529984 1566131904 1696642896 2088175872 2262190528 2544964344 2627059968 3132263808 3393285792 4524381056 5089928688 6264527616 6786571584 9048762112 10179857376 13573143168 20359714752 27146286336 40719429504 81438859008
• Sum of all divisors σ(n): 263322142720
• Sum of proper divisors (its aliquot sum) s(n): 181883283712
• 81438859008 is an abundant number, because the sum of its proper divisors (181883283712) is greater than itself. Its abundance is 100444424704

Bases of 81438859008

• Binary: 1001011110110001000100101111100000000₂
• Hexadecimal: 0x12F6225F00
• Base-36: 11EULDS0

Squares and roots of 81438859008

• 81438859008 squared (81438859008²) is 6632287756524902744064
• 81438859008 cubed (81438859008³) is 540125947504116186614740404928512
• The square root of 81438859008 is 285374.9446044625
• The cube root of 81438859008 is 4334.5487670233

Scales and comparisons

• 81,438,859,008 seconds is equal to 2,589 years, 26 weeks, 1 day, 9 hours, 16 minutes, 48 seconds.
• To count from 1 to 81,438,859,008 would take you about five thousand, one hundred seventy-nine 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 81438859008 cubic inches would be around 361.2 feet tall.

Recreational maths with 81438859008

• 81438859008 backwards is 80095883418
• The number of decimal digits it has is: 11
• The sum of 81438859008's digits is 54
• More coming soon!