81139140264

Names of 81139140264

• Cardinal: 81139140264 can be written as Eighty-one billion, one hundred thirty-nine million, one hundred forty thousand, two hundred sixty-four.

Scientific notation

• Scientific notation: 8.1139140264 × 10¹⁰

Factors of 81139140264

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4003

Divisors of 81139140264

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 21 24 26 28 39 42 52 56 78 84 91 104 156 168 169 182 273 312 338 364 507 546 676 728 941 1014 1092 1183 1352 1882 2028 2184 2366 2823 3037 3549 3764 4056 4732 5646 6074 6587 7098 7528 9111 9464 11292 12148 12233 13174 14196 18222 19761 21259 22584 24296 24466 26348 28392 36444 36699 39481 39522 42518 48932 52696 63777 72888 73398 78962 79044 85036 85631 97864 118443 127554 146796 157924 158088 159029 170072 171262 236886 255108 256893 276367 293592 315848 318058 342524 473772 477087 510216 513253 513786 552734 636116 685048 829101 947544 954174 1026506 1027572 1105468 1113203 1272232 1539759 1658202 1908348 2053012 2055144 2210936 2226406 2857817 3079518 3316404 3339609 3592771 3816696 4106024 4452812 5715634 6159036 6632808 6679218 7185542 8573451 8905624 10778313 11431268 12318072 13358436 14371084 17146902 20004719 21556626 22862536 26716872 28742168 34293804 37151621 40009438 43113252 60014157 68587608 74303242 80018876 86226504 111454863 120028314 148606484 160037752 222909726 240056628 260061347 297212968 445819452 480113256 482971073 520122694 780184041 891638904 965942146 1040245388 1448913219 1560368082 1931884292 2080490776 2897826438 3120736164 3380797511 3863768584 5795652876 6241472328 6761595022 10142392533 11591305752 13523190044 20284785066 27046380088 40569570132 81139140264
• Sum of all divisors σ(n): 251380160640
• Sum of proper divisors (its aliquot sum) s(n): 170241020376
• 81139140264 is an abundant number, because the sum of its proper divisors (170241020376) is greater than itself. Its abundance is 89101880112

Bases of 81139140264

• Binary: 1001011100100010001010000011010101000₂
• Hexadecimal: 0x12E44506A8
• Base-36: 119W5DBC

Squares and roots of 81139140264

• 81139140264 squared (81139140264²) is 6583560082781065989696
• 81139140264 cubed (81139140264³) is 534184404993244364541383722719744
• The square root of 81139140264 is 284849.3290566085
• The cube root of 81139140264 is 4329.2247626539

Scales and comparisons

• 81,139,140,264 seconds is equal to 2,579 years, 50 weeks, 4 days, 10 hours, 4 minutes, 24 seconds.
• To count from 1 to 81,139,140,264 would take you about five thousand, one hundred fifty-nine 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 81139140264 cubic inches would be around 360.8 feet tall.

Recreational maths with 81139140264

• 81139140264 backwards is 46204193118
• 81139140264 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81139140264's digits is 39
• More coming soon!