81401988528

Names of 81401988528

• Cardinal: 81401988528 can be written as Eighty-one billion, four hundred one million, nine hundred eighty-eight thousand, five hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1401988528 × 10¹⁰

Factors of 81401988528

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 102

Divisors of 81401988528

• Number of divisors d(n): 540
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 36 37 42 48 49 53 54 56 63 72 74 84 98 106 108 111 112 126 144 147 148 159 168 189 196 212 216 222 252 259 294 296 318 333 336 371 378 392 424 432 441 444 477 504 518 588 592 636 666 742 756 777 784 848 882 888 954 999 1008 1036 1113 1176 1272 1323 1332 1369 1431 1484 1512 1554 1764 1776 1813 1908 1961 1998 2072 2226 2331 2352 2544 2597 2646 2664 2738 2809 2862 2968 3024 3108 3339 3528 3626 3816 3922 3996 4107 4144 4452 4662 5194 5292 5328 5439 5476 5618 5724 5883 5936 6216 6678 6993 7056 7252 7632 7791 7844 7992 8214 8427 8904 9324 9583 10017 10388 10584 10878 10952 11236 11448 11766 12321 12432 13356 13727 13986 14504 15582 15688 15984 16317 16428 16854 17649 17808 18648 19166 19663 20034 20776 21168 21756 21904 22472 22896 23373 23532 24642 25281 26712 27454 27972 28749 29008 31164 31376 32634 32856 33708 35298 36963 37296 38332 39326 40068 41181 41552 43512 44944 46746 47064 48951 49284 50562 52947 53424 54908 55944 57498 58989 62328 65268 65712 67081 67416 70119 70596 72557 73926 75843 76664 78652 80136 82362 86247 87024 93492 94128 96089 97902 98568 101124 103933 105894 109816 111888 114996 117978 123543 124656 130536 134162 134832 137641 140238 141192 145114 147852 151686 153328 157304 160272 164724 172494 176967 186984 192178 195804 197136 201243 202248 207866 211788 217671 219632 229992 235956 247086 258741 261072 268324 275282 280476 282384 288267 290228 295704 303372 311799 314608 329448 344988 353934 370629 373968 384356 391608 402486 404496 412923 415732 423576 435342 459984 471912 494172 507899 517482 530901 536648 550564 560952 576534 580456 591408 603729 606744 623598 653013 658896 689976 707868 727531 741258 768712 783216 804972 825846 831464 847152 864801 870684 935397 943824 988344 1015798 1034964 1061802 1073296 1101128 1121904 1153068 1160912 1207458 1213488 1238769 1247196 1306026 1379952 1415736 1455062 1482516 1523697 1537424 1609944 1651692 1662928 1729602 1741368 1811187 1870794 1959039 1976688 2031596 2069928 2123604 2182593 2202256 2306136 2414916 2477538 2494392 2594403 2612052 2806191 2831472 2910124 2965032 3047394 3219888 3303384 3459204 3482736 3555293 3622374 3716307 3741588 3845521 3918078 4063192 4139856 4247208 4365186 4571091 4612272 4829832 4955076 4988784 5092717 5188806 5224104 5612382 5820248 5930064 6094788 6547779 6606768 6918408 7110586 7244748 7432614 7483176 7691042 7836156 8126384 8494416 8730372 9142182 9659664 9910152 10185434 10377612 10448208 10665879 11224764 11536563 11640496 12189576 13095558 13713273 13836816 14221172 14489496 14865228 14966352 15278151 15382084 15672312 17460744 18284364 19643337 19820304 20370868 20755224 21331758 22449528 23073126 24379152 26191116 26918647 27426546 28442344 28978992 29730456 30556302 30764168 31344624 31997637 34609689 34921488 36568728 39286674 40741736 41510448 42663516 44899056 45834453 46146252 52382232 53837294 54853092 56884688 59460912 61112604 61528336 63995274 69219378 73137456 78573348 80755941 81483472 85327032 91668906 92292504 95992911 103829067 104764464 107674588 109706184 122225208 127990548 137503359 138438756 157146696 161511882 170654064 183337812 184585008 188430529 191985822 207658134 215349176 219412368 242267823 244450416 255981096 275006718 276877512 314293392 323023764 366675624 376861058 383971644 415316268 430698352 484535646 511962192 550013436 553755024 565291587 646047528 726803469 733351248 753722116 767943288 830632536 969071292 1100026872 1130583174 1292095056 1453606938 1507444232 1535886576 1661265072 1695874761 1938142584 2200053744 2261166348 2907213876 3014888464 3391749522 3876285168 4522332696 5087624283 5814427752 6783499044 9044665392 10175248566 11628855504 13566998088 20350497132 27133996176 40700994264 81401988528
• Sum of all divisors σ(n): 284716073880
• Sum of proper divisors (its aliquot sum) s(n): 203314085352
• 81401988528 is an abundant number, because the sum of its proper divisors (203314085352) is greater than itself. Its abundance is 121912096824

Bases of 81401988528

• Binary: 1001011110011111011111100010110110000₂
• Hexadecimal: 0x12F3EFC5B0
• Base-36: 11E8N4C0

Squares and roots of 81401988528

• 81401988528 squared (81401988528²) is 6626283736312643606784
• 81401988528 cubed (81401988528³) is 539392672686594791900783710973952
• The square root of 81401988528 is 285310.3372259759
• The cube root of 81401988528 is 4333.8945297217

Scales and comparisons

• 81,401,988,528 seconds is equal to 2,588 years, 17 weeks, 1 day, 15 hours, 28 minutes, 48 seconds.
• To count from 1 to 81,401,988,528 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 81401988528 cubic inches would be around 361.2 feet tall.

Recreational maths with 81401988528

• 81401988528 backwards is 82588910418
• 81401988528 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81401988528's digits is 54
• More coming soon!