81139422672

Names of 81139422672

• Cardinal: 81139422672 can be written as Eighty-one billion, one hundred thirty-nine million, four hundred twenty-two thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 8.1139422672 × 10¹⁰

Factors of 81139422672

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 25361

Divisors of 81139422672

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 6 7 8 9 11 12 14 16 17 18 21 22 24 28 33 34 36 42 44 48 51 56 63 66 68 72 77 84 88 99 102 112 119 126 132 136 144 153 154 168 176 187 198 204 231 238 252 264 272 289 306 308 336 357 374 396 408 462 476 504 528 561 578 612 616 693 714 748 792 816 867 924 952 1008 1071 1122 1156 1224 1232 1309 1386 1428 1496 1584 1683 1734 1848 1904 2023 2142 2244 2312 2448 2601 2618 2772 2856 2992 3179 3366 3468 3696 3927 4046 4284 4488 4624 5202 5236 5544 5712 6069 6358 6732 6936 7854 8092 8568 8976 9537 10404 10472 11088 11781 12138 12716 13464 13872 15708 16184 17136 18207 19074 20808 20944 22253 23562 24276 25321 25432 26928 28611 31416 32368 36414 38148 41616 44506 47124 48552 50642 50864 57222 62832 66759 72828 75963 76296 89012 94248 97104 101284 114444 133518 145656 151926 152592 177247 178024 188496 200277 202568 227889 228888 267036 278531 291312 303852 354494 356048 400554 405136 430457 455778 457776 531741 534072 557062 607704 708988 801108 835593 860914 911556 1063482 1068144 1114124 1215408 1291371 1417976 1595223 1602216 1671186 1721828 1823112 1949717 2126964 2228248 2506779 2582742 2835952 3013199 3190446 3204432 3342372 3443656 3646224 3874113 3899434 4253928 4456496 4735027 5013558 5165484 5849151 6026398 6380892 6684744 6887312 7317769 7748226 7798868 8507856 9039597 9470054 10027116 10330968 11698302 12052796 12761784 13369488 14205081 14635538 15496452 15597736 17547453 18079194 18940108 20054232 20661936 21953307 23396604 24105592 25523568 27118791 28410162 29271076 30992904 31195472 33145189 35094906 36158388 37880216 40108464 42615243 43906614 46793208 48211184 51224383 54237582 56820324 58542152 61985808 65859921 66290378 70189812 72316776 75760432 80495459 85230486 87813228 93586416 99435567 102448766 108475164 113640648 117084304 131719842 132580756 140379624 144633552 153673149 160990918 170460972 175626456 198871134 204897532 216950328 227281296 241486377 263439684 265161512 280759248 298306701 307346298 321981836 340921944 351252912 397742268 409795064 433900656 461019447 482972754 526879368 530323024 563468213 596613402 614692596 643963672 681843888 724459131 795484536 819590128 922038894 965945508 1053758736 1126936426 1193226804 1229385192 1287927344 1448918262 1590969072 1690404639 1844077788 1931891016 2253872852 2386453608 2458770384 2897836524 3380809278 3688155576 3863782032 4507745704 4772907216 5071213917 5795673048 6761618556 7376311152 9015491408 10142427834 11591346096 13523237112 20284855668 27046474224 40569711336 81139422672
• Sum of all divisors σ(n): 300754863552
• Sum of proper divisors (its aliquot sum) s(n): 219615440880
• 81139422672 is an abundant number, because the sum of its proper divisors (219615440880) is greater than itself. Its abundance is 138476018208

Bases of 81139422672

• Binary: 1001011100100010010010101010111010000₂
• Hexadecimal: 0x12E44955D0
• Base-36: 119WBF80

Squares and roots of 81139422672

• 81139422672 squared (81139422672²) is 6583605911545467619584
• 81139422672 cubed (81139422672³) is 534189982762765541931315880808448
• The square root of 81139422672 is 284849.8247708781
• The cube root of 81139422672 is 4329.2297853277

Scales and comparisons

• 81,139,422,672 seconds is equal to 2,579 years, 51 weeks, 16 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,139,422,672 would take you about five thousand, one hundred fifty-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 81139422672 cubic inches would be around 360.8 feet tall.

Recreational maths with 81139422672

• 81139422672 backwards is 27622493118
• The number of decimal digits it has is: 11
• The sum of 81139422672's digits is 45
• More coming soon!