81725801932729728

Names of 81725801932729728

• Cardinal: 81725801932729728 can be written as Eighty-one quadrillion, seven hundred twenty-five trillion, eight hundred one billion, nine hundred thirty-two million, seven hundred twenty-nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1725801932729728 × 10¹⁶

Factors of 81725801932729728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 616318297

Divisors of 81725801932729728

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 17 18 24 27 32 34 36 37 48 51 54 61 64 68 72 74 96 102 108 111 122 128 136 144 148 153 183 192 204 216 222 244 272 288 296 306 333 366 384 408 432 444 459 488 544 549 576 592 612 629 666 732 816 864 888 918 976 999 1037 1088 1098 1152 1184 1224 1258 1332 1464 1632 1647 1728 1776 1836 1887 1952 1998 2074 2176 2196 2257 2368 2448 2516 2664 2928 3111 3264 3294 3456 3552 3672 3774 3904 3996 4148 4392 4514 4736 4896 5032 5328 5661 5856 6222 6528 6588 6771 7104 7344 7548 7808 7992 8296 8784 9028 9333 9792 10064 10656 11322 11712 12444 13176 13542 14208 14688 15096 15984 16592 16983 17568 18056 18666 19584 20128 20313 21312 22644 23424 24888 26352 27084 27999 29376 30192 31968 33184 33966 35136 36112 37332 38369 40256 40626 42624 45288 49776 52704 54168 55998 58752 60384 60939 63936 66368 67932 70272 72224 74664 76738 80512 81252 90576 99552 105408 108336 111996 115107 120768 121878 127872 132736 135864 144448 149328 153476 162504 181152 199104 210816 216672 223992 230214 241536 243756 271728 288896 298656 306952 325008 345321 362304 398208 433344 447984 460428 487512 543456 597312 613904 650016 690642 724608 866688 895968 920856 975024 1035963 1086912 1194624 1227808 1300032 1381284 1791936 1841712 1950048 2071926 2173824 2455616 2600064 2762568 3583872 3683424 3900096 4143852 4911232 5525136 7366848 7800192 8287704 11050272 14733696 16575408 22100544 33150816 44201088 66301632 132603264 616318177 1232636354 1848954531 2465272708 3697909062 4930545416 5546863593 7395818124 9861090832 10477409009 11093727186 14791636248 16640590779 19722181664 20954818018 22187454372 22803772549 29583272496 31432227027 33281181558 37595408797 39444363328 41909636036 44374908744 45607545098 59166544992 62864454054 66562363116 68411317647 75190817594 78888726656 83819272072 88749817488 91215090196 94296681081 112786226391 118333089984 125728908108 133124726232 136822635294 150381635188 167638544144 177499634976 182430180392 188593362162 205233952941 225572452782 236666179968 251457816216 266249452464 273645270588 282890043243 300763270376 335277088288 338358679173 354999269952 364860360784 377186724324 387664133333 410467905882 451144905564 502915632432 532498904928 547290541176 565780086486 601526540752 615701858823 639121949549 670554176576 676717358346 709998539904 729720721568 754373448648 775328266666 820935811764 902289811128 1005831264864 1015076037519 1064997809856 1094581082352 1131560172972 1162992399999 1203053081504 1231403717646 1278243899098 1341108353152 1353434716692 1391030125489 1459441443136 1508746897296 1550656533332 1641871623528 1804579622256 1917365848647 2011662529728 2030152075038 2129995619712 2189162164704 2263120345944 2325984799998 2406106163008 2462807435292 2556487798196 2706869433384 2782060250978 2918882886272 3017493794592 3101313066664 3283743247056 3488977199997 3609159244512 3834731697294 4023325059456 4060304150076 4173090376467 4378324329408 4526240691888 4651969599996 4812212326016 4925614870584 5112975596392 5413738866768 5564120501956 5752097545941 6034987589184 6202626133328 6567486494112 6977954399994 7218318489024 7669463394588 8120608300152 8346180752934 8756648658816 9052481383776 9303939199992 9851229741168 10225951192784 10466931599991 10827477733536 11128241003912 11504195091882 12069975178368 12405252266656 12519271129401 13134972988224 13955908799988 14436636978048 15338926789176 16241216600304 16692361505868 17256292637823 18104962767552 18607878399984 19702459482336 20451902385568 20933863199982 21654955467072 22256482007824 23008390183764 23647512133313 24810504533312 25038542258802 26269945976448 27911817599976 30677853578352 32482433200608 33384723011736 34512585275646 36209925535104 37215756799968 37557813388203 39404918964672 40903804771136 41867726399964 43309910934144 44512964015648 46016780367528 47295024266626 49621009066624 50077084517604 55823635199952 61355707156704 64964866401216 66769446023472 69025170551292 70942536399939 74431513599936 75115626776406 78809837929344 81807609542272 83735452799928 89025928031296 92033560735056 94590048533252 100154169035208 111647270399904 122711414313408 129929732802432 133538892046944 138050341102584 141885072799878 148863027199872 150231253552812 167470905599856 178051856062592 184067121470112 189180097066504 200308338070416 212827609199817 223294540799808 245422828626816 267077784093888 276100682205168 283770145599756 300462507105624 334941811199712 368134242940224 378360194133008 400616676140832 425655218399634 446589081599616 534155568187776 552201364410336 567540291199512 600925014211248 638482827599451 669883622399424 736268485880448 756720388266016 801233352281664 851310436799268 1104402728820672 1135080582399024 1201850028422496 1276965655198902 1339767244798848 1513440776532032 1602466704563328 1702620873598536 2208805457641344 2270161164798048 2403700056844992 2553931310397804 3026881553064064 3405241747197072 4540322329596096 4807400113689984 5107862620795608 6810483494394144 9080644659192192 10215725241591216 13620966988788288 20431450483182432 27241933977576576 40862900966364864 81725801932729728
• Sum of all divisors σ(n): 266595577184764800
• Sum of proper divisors (its aliquot sum) s(n): 184869775252035072
• 81725801932729728 is an abundant number, because the sum of its proper divisors (184869775252035072) is greater than itself. Its abundance is 103143973319305344

Bases of 81725801932729728

• Binary: 100100010010110010010111100010001001011110010110110000000₂
• Hexadecimal: 0x122592F112F2D80
• Base-36: MCPDN3P2LC0

Squares and roots of 81725801932729728

• 81725801932729728 squared (81725801932729728²) is 6679106701547770144609001494953984
• 81725801932729728 cubed (81725801932729728³) is 545855351378260831849685304972986431281206868836352
• The square root of 81725801932729728 is 285877249.7641771563
• The cube root of 81725801932729728 is 433963.3604891873

Scales and comparisons

• 81,725,801,932,729,728 seconds is equal to 2,598,627,706 years, 49 weeks, 5 days, 12 hours, 28 minutes, 48 seconds.
• To count from 1 to 81,725,801,932,729,728 would take you about seven billion, seven hundred ninety-five million, eight hundred eighty-three thousand, one hundred twenty 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 81725801932729728 cubic inches would be around 36163.6 feet tall.

Recreational maths with 81725801932729728

• 81725801932729728 backwards is 82792723910852718
• The number of decimal digits it has is: 17
• The sum of 81725801932729728's digits is 81
• More coming soon!