81228728487200

Names of 81228728487200

• Cardinal: 81228728487200 can be written as Eighty-one trillion, two hundred twenty-eight billion, seven hundred twenty-eight million, four hundred eighty-seven thousand, two hundred.

Scientific notation

• Scientific notation: 8.12287284872 × 10¹³

Factors of 81228728487200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 943

Divisors of 81228728487200

• Number of divisors d(n): 378
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 49 50 56 70 80 98 100 112 140 160 175 196 200 224 245 280 343 350 392 400 490 560 686 700 784 800 929 980 1120 1225 1372 1400 1568 1715 1858 1960 2401 2450 2744 2800 3430 3716 3920 4645 4802 4900 5488 5600 6503 6860 7432 7840 8575 9290 9604 9800 10976 12005 13006 13720 14864 16807 17150 18580 19208 19600 23225 24010 26012 27440 29728 32515 33614 34300 37160 38416 39200 45521 46450 48020 52024 54880 60025 65030 67228 68600 74320 76832 84035 91042 92900 96040 104048 117649 120050 130060 134456 137200 148640 162575 168070 182084 185800 192080 208096 227605 235298 240100 260120 268912 274400 318647 325150 336140 364168 371600 384160 420175 455210 470596 480200 520240 537824 588245 637294 650300 672280 728336 743200 840350 863041 910420 941192 960400 1040480 1138025 1176490 1274588 1300600 1344560 1456672 1593235 1680700 1726082 1820840 1882384 1920800 2230529 2276050 2352980 2549176 2601200 2689120 2941225 3186470 3361400 3452164 3641680 3764768 4315205 4461058 4552100 4705960 5098352 5202400 5882450 6041287 6372940 6722800 6904328 7283360 7966175 8630410 8922116 9104200 9411920 10196704 11152645 11764900 12082574 12745880 13445600 13808656 15613703 15932350 17260820 17844232 18208400 18823840 21576025 22305290 23529800 24165148 25491760 27617312 30206435 31227406 31864700 34521640 35688464 36416800 42289009 43152050 44610580 47059600 48330296 50983520 55763225 60412870 62454812 63729400 69043280 71376928 78068515 84578018 86304100 89221160 94119200 96660592 109295921 111526450 120825740 124909624 127458800 138086560 151032175 156137030 169156036 172608200 178442320 193321184 211445045 218591842 223052900 241651480 249819248 254917600 296023063 302064350 312274060 338312072 345216400 356884640 390342575 422890090 437183684 446105800 483302960 499638496 546479605 592046126 604128700 624548120 676624144 690432800 780685150 845780180 874367368 892211600 966605920 1057225225 1092959210 1184092252 1208257400 1249096240 1353248288 1480115315 1561370300 1691560360 1748734736 1784423200 2072161441 2114450450 2185918420 2368184504 2416514800 2498192480 2732398025 2960230630 3122740600 3383120720 3497469472 4144322882 4228900900 4371836840 4736369008 4833029600 5464796050 5920461260 6245481200 6766241440 7400576575 8288645764 8457801800 8743673680 9472738016 10360807205 10929592100 11840922520 12490962400 14505130087 14801153150 16577291528 16915603600 17487347360 20721614410 21859184200 23681845040 29010260174 29602306300 33154583056 33831207200 41443228820 43718368400 47363690080 51804036025 58020520348 59204612600 66309166112 72525650435 82886457640 87436736800 101535910609 103608072050 116041040696 118409225200 145051300870 165772915280 203071821218 207216144100 232082081392 236818450400 290102601740 331545830560 362628252175 406143642436 414432288200 464164162784 507679553045 580205203480 725256504350 812287284872 828864576400 1015359106090 1160410406960 1450513008700 1624574569744 1657729152800 2030718212180 2320820813920 2538397765225 2901026017400 3249149139488 4061436424360 5076795530450 5802052034800 8122872848720 10153591060900 11604104069600 16245745697440 20307182121800 40614364243600 81228728487200
• Sum of all divisors σ(n): 231598589919291
• Sum of proper divisors (its aliquot sum) s(n): 150369861432091
• 81228728487200 is an abundant number, because the sum of its proper divisors (150369861432091) is greater than itself. Its abundance is 69141132944891

Bases of 81228728487200

• Binary: 10010011110000010001001100000011100110100100000₂
• Hexadecimal: 0x49E08981CD20
• Base-36: SSJYNOE8W

Squares and roots of 81228728487200

• 81228728487200 squared (81228728487200²) is 6598106331647256800563840000
• 81228728487200 cubed (81228728487200³) is 535955787743050219377693919230222848000000
• The square root of 81228728487200 is 9012698.1801899923
• The cube root of 81228728487200 is 43308.1752004883

Scales and comparisons

• 81,228,728,487,200 seconds is equal to 2,582,822 years, 16 weeks, 10 hours, 53 minutes, 20 seconds.
• To count from 1 to 81,228,728,487,200 would take you about six million, four hundred fifty-seven thousand and fifty-five 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 81228728487200 cubic inches would be around 3609 feet tall.

Recreational maths with 81228728487200

• 81228728487200 backwards is 00278482782218
• The number of decimal digits it has is: 14
• The sum of 81228728487200's digits is 59
• More coming soon!