81320938360766208

Names of 81320938360766208

• Cardinal: 81320938360766208 can be written as Eighty-one quadrillion, three hundred twenty trillion, nine hundred thirty-eight billion, three hundred sixty million, seven hundred sixty-six thousand, two hundred eight.

Scientific notation

• Scientific notation: 8.1320938360766208 × 10¹⁶

Factors of 81320938360766208

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 7735162447

Divisors of 81320938360766208

• Number of divisors d(n): 324
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 27 32 36 39 48 52 54 64 72 78 81 96 104 108 117 128 144 156 162 169 192 208 216 234 243 256 288 312 324 338 351 384 416 432 468 486 507 576 624 648 676 702 768 832 864 936 972 1014 1053 1152 1248 1296 1352 1404 1521 1664 1728 1872 1944 2028 2106 2304 2496 2592 2704 2808 3042 3159 3328 3456 3744 3888 4056 4212 4563 4992 5184 5408 5616 6084 6318 6912 7488 7776 8112 8424 9126 9984 10368 10816 11232 12168 12636 13689 14976 15552 16224 16848 18252 20736 21632 22464 24336 25272 27378 29952 31104 32448 33696 36504 41067 43264 44928 48672 50544 54756 62208 64896 67392 73008 82134 89856 97344 101088 109512 129792 134784 146016 164268 194688 202176 219024 269568 292032 328536 389376 404352 438048 584064 657072 808704 876096 1168128 1314144 1752192 2628288 3504384 5256576 10513152 7735162429 15470324858 23205487287 30940649716 46410974574 61881299432 69616461861 92821949148 100557111577 123762598864 139232923722 185643898296 201114223154 208849385583 247525197728 278465847444 301671334731 371287796592 402228446308 417698771166 495050395456 556931694888 603342669462 626548156749 742575593184 804456892616 835397542332 905014004193 990100790912 1113863389776 1206685338924 1253096313498 1307242450501 1485151186368 1608913785232 1670795084664 1810028008386 1879644470247 1980201581824 2227726779552 2413370677848 2506192626996 2614484901002 2715042012579 2970302372736 3217827570464 3341590169328 3620056016772 3759288940494 3921727351503 4455453559104 4826741355696 5012385253992 5228969802004 5430084025158 5940604745472 6435655140928 6683180338656 7240112033544 7518577880988 7843454703006 8145126037737 8910907118208 9653482711392 10024770507984 10457939604008 10860168050316 11765182054509 12871310281856 13366360677312 14480224067088 15037155761976 15686909406012 16290252075474 17821814236416 19306965422784 20049541015968 20915879208016 21720336100632 23530364109018 24435378113211 25742620563712 26732721354624 28960448134176 30074311523952 31373818812024 32580504150948 35295546163527 38613930845568 40099082031936 41831758416032 43440672201264 47060728218036 48870756226422 53465442709248 57920896268352 60148623047904 62747637624048 65161008301896 70591092327054 77227861691136 80198164063872 83663516832064 86881344402528 94121456436072 97741512452844 105886638490581 115841792536704 120297246095808 125495275248096 130322016603792 141182184654108 160396328127744 167327033664128 173762688805056 188242912872144 195483024905688 211773276981162 231683585073408 240594492191616 250990550496192 260644033207584 282364369308216 317659915471743 334654067328256 347525377610112 376485825744288 390966049811376 423546553962324 481188984383232 501981100992384 521288066415168 564728738616432 635319830943486 695050755220224 752971651488576 781932099622752 847093107924648 1003962201984768 1042576132830336 1129457477232864 1270639661886972 1505943302977152 1563864199245504 1694186215849296 2085152265660672 2258914954465728 2541279323773944 3011886605954304 3127728398491008 3388372431698592 4517829908931456 5082558647547888 6255456796982016 6776744863397184 9035659817862912 10165117295095776 13553489726794368 20330234590191552 27106979453588736 40660469180383104 81320938360766208
• Sum of all divisors σ(n): 263295120931238760
• Sum of proper divisors (its aliquot sum) s(n): 181974182570472552
• 81320938360766208 is an abundant number, because the sum of its proper divisors (181974182570472552) is greater than itself. Its abundance is 100653244209706344

Bases of 81320938360766208

• Binary: 100100000111010001111011001101011110010110111111100000000₂
• Hexadecimal: 0x120E8F66BCB7F00
• Base-36: M8PV7CFLC00

Squares and roots of 81320938360766208

• 81320938360766208 squared (81320938360766208²) is 6613095015875536996678464834699264
• 81320938360766208 cubed (81320938360766208³) is 537783092159904771844712927013157450065432293670912
• The square root of 81320938360766208 is 285168263.2425393301
• The cube root of 81320938360766208 is 433245.5664288367

Scales and comparisons

• 81,320,938,360,766,208 seconds is equal to 2,585,754,297 years, 36 weeks, 17 hours, 16 minutes, 48 seconds.
• To count from 1 to 81,320,938,360,766,208 would take you about seven billion, seven hundred fifty-seven million, two hundred sixty-two thousand, eight hundred ninety-three 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 81320938360766208 cubic inches would be around 36103.8 feet tall.

Recreational maths with 81320938360766208

• 81320938360766208 backwards is 80266706383902318
• 81320938360766208 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81320938360766208's digits is 72
• More coming soon!