81321668742675556

Names of 81321668742675556

• Cardinal: 81321668742675556 can be written as Eighty-one quadrillion, three hundred twenty-one trillion, six hundred sixty-eight billion, seven hundred forty-two million, six hundred seventy-five thousand, five hundred fifty-six.

Scientific notation

• Scientific notation: 8.1321668742675556 × 10¹⁶

Factors of 81321668742675556

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 20693

Divisors of 81321668742675556

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 13 26 29 52 58 113 116 127 226 254 377 421 452 457 508 754 842 914 1469 1508 1651 1684 1828 2938 3277 3302 3683 5473 5876 5941 6554 6604 7366 10946 11882 12209 13108 13253 14351 14732 19531 21892 23764 24418 26506 28702 39062 42601 47573 47879 48836 51641 53012 53467 57404 58039 78124 85202 95146 95758 103282 106934 116078 158717 170404 172289 186563 190292 191516 192397 206564 213868 232156 253903 317434 344578 373126 384794 416179 507806 566399 618449 634868 671333 689156 695071 746252 754507 769588 832358 1015612 1132798 1236898 1342666 1379617 1390142 1497589 1509014 1550543 1664716 1683131 2207003 2265596 2473796 2480437 2501161 2685332 2759234 2780284 2995178 3018028 3101086 3366262 4414006 4960874 5002322 5410327 5518468 5579513 5990356 6041771 6202172 6558407 6732524 7363187 8222551 8828012 8925667 9921748 10004644 10820654 11159026 12083542 13116814 14726374 16445102 17851334 17935021 19468657 20157059 21641308 21740861 21880703 22318052 24167084 24434419 26233628 28691039 29452748 32245681 32890204 35702668 35870042 38937314 40314118 43481722 43761406 48868838 57382078 64003087 64491362 71740084 71932673 72533669 77874628 78543023 80628236 85259291 86963444 87522812 97737676 106893163 114764156 116033671 128006174 128982724 143865346 145067338 157086046 170518582 175211359 190193803 213786326 232067342 238453979 256012348 258844343 280289381 282631193 287730692 290134676 314172092 317647447 341037164 350422718 380387606 427572652 464134684 476907958 517688686 560578762 565262386 630484969 635294894 700845436 708598151 760775212 832040131 929148263 935124749 953815916 1008600371 1035377372 1044263977 1121157524 1130524772 1133559709 1260969938 1270589788 1417196302 1664080262 1858296526 1870249498 2017200742 2088527954 2267119418 2277747667 2472519439 2521939876 2761089347 2834392604 3099901727 3328160524 3364976459 3643761953 3716593052 3740498996 3757705807 4034401484 4177055908 4534238836 4555495334 4945038878 5522178694 6199803454 6729952918 7287523906 7515411614 8128392049 8196304597 9110990668 9211775963 9890077756 11044357388 12078927419 12399606908 13111804823 13459905836 13575431701 14575047812 14736276217 15030823228 16256784098 16392609194 18423551926 24157854838 26223609646 26945299627 27150863402 29249410759 29472552434 30283655333 32513568196 32785218388 32873231561 35894161511 36847103852 48315709676 48850175491 52447219292 53890599254 54301726804 58498821518 58945104868 60567310666 65746463122 71788323022 80071591063 97700350982 105669096637 107781198508 108973468403 116997643036 118001829401 121134621332 128092247117 131492926244 143576646044 160143182126 195400701964 211338193274 217946936806 236003658802 256184494234 320286364252 350288895151 380242339867 393687519329 422676386548 424620756191 427352010293 435893873612 472007317604 477228637489 512368988468 700577790302 760484679734 787375038658 849241512382 854704020586 954457274978 1040930683819 1401155580604 1416655089239 1520969359468 1534023782213 1574750077316 1665199212521 1698483024764 1709408041172 1908914549956 2081861367638 2833310178478 3068047564426 3330398425042 3422053052629 3714675166393 4163722735276 5520069830483 5666620356956 6136095128852 6203972287357 6660796850084 6844106105258 7429350332786 11040139660966 12314001929539 12407944574714 13688212210516 13839630487181 14858700665572 22080279321932 24628003859078 24815889149428 27679260974362 44486689684177 48290777163109 49256007718156 53926836036257 55358521948724 88973379368354 96581554326218 107853672072514 160082025084007 177946758736708 179915196333353 193163108652436 215707344145028 320164050168014 359830392666706 640328100336028 701048868471341 719660785333412 1402097736942682 1563878245051453 2804195473885364 3127756490102906 6255512980205812 20330417185668889 40660834371337778 81321668742675556
• Sum of all divisors σ(n): 161952179124879360
• Sum of proper divisors (its aliquot sum) s(n): 80630510382203804
• 81321668742675556 is a deficient number, because the sum of its proper divisors (80630510382203804) is less than itself. Its deficiency is 691158360471752

Bases of 81321668742675556

• Binary: 100100000111010011010000001111001111100101111110001100100₂
• Hexadecimal: 0x120E9A079F2FC64
• Base-36: M8Q4IVM4G2S

Squares and roots of 81321668742675556

• 81321668742675556 squared (81321668742675556²) is 6613213807093454545061797479909136
• 81321668742675556 cubed (81321668742675556³) is 537797582544942196616614632358904925709764408279616
• The square root of 81321668742675556 is 285169543.8553625699
• The cube root of 81321668742675556 is 433246.8634862449

Scales and comparisons

• 81,321,668,742,675,556 seconds is equal to 2,585,777,521 years, 30 weeks, 1 day, 59 minutes, 16 seconds.
• To count from 1 to 81,321,668,742,675,556 would take you about seven billion, seven hundred fifty-seven million, three hundred thirty-two thousand, five hundred sixty-four 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 81321668742675556 cubic inches would be around 36103.9 feet tall.

Recreational maths with 81321668742675556

• 81321668742675556 backwards is 65557624786612318
• The number of decimal digits it has is: 17
• The sum of 81321668742675556's digits is 82
• More coming soon!