81878346840759816

Names of 81878346840759816

• Cardinal: 81878346840759816 can be written as Eighty-one quadrillion, eight hundred seventy-eight trillion, three hundred forty-six billion, eight hundred forty million, seven hundred fifty-nine thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 8.1878346840759816 × 10¹⁶

Factors of 81878346840759816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 6342

Divisors of 81878346840759816

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 6 8 12 19 24 38 57 76 114 152 228 361 439 456 722 878 1083 1317 1444 1756 2166 2634 2888 3512 4332 5268 5879 6859 8341 8664 10536 11758 13718 16682 17637 20577 23516 25023 27436 33364 35274 41154 47032 50046 54872 66728 70548 82308 100092 111701 141096 158479 164616 192721 200184 223402 316958 335103 385442 446804 475437 578163 633916 670206 770884 893608 950874 1156326 1267832 1340412 1541768 1901748 2122319 2312652 2580881 2680824 3011101 3661699 3803496 4244638 4625304 5161762 6022202 6366957 7323398 7742643 8489276 9033303 10323524 10985097 12044404 12733914 14646796 15485286 16978552 18066606 20647048 21970194 24088808 25467828 29293592 30970572 36133212 40324061 43940388 49036739 50935656 61941144 69572281 72266424 80648122 84604519 87880776 98073478 120972183 139144562 147110217 161296244 169209038 196146956 208716843 241944366 253813557 278289124 294220434 322592488 338418076 392293912 417433686 483888732 507627114 556578248 588440868 676836152 834867372 931698041 967777464 1015254228 1133006759 1176881736 1321873339 1607485861 1669734744 1863396082 2030508456 2266013518 2643746678 2795094123 3214971722 3399020277 3726792164 3965620017 4532027036 4822457583 5287493356 5590188246 6429943444 6798040554 7453584328 7931240034 9064054072 9644915166 10574986712 11180376492 12859886888 13596081108 15862480068 17702262779 19289830332 21527128421 22360752984 27192162216 30542231359 31724960136 35404525558 38579660664 43054256842 53106788337 61084462718 64581385263 70809051116 86108513684 91626694077 106213576674 122168925436 129162770526 141618102232 172217027368 183253388154 212427153348 244337850872 258325541052 366506776308 409015439999 424854306696 497389967201 516651082104 580302395821 733013552616 818030879998 994779934402 1160604791642 1227046319997 1492169901603 1636061759996 1740907187463 1989559868804 2321209583284 2454092639994 2984339803206 3272123519992 3481814374926 3979119737608 4642419166568 4908185279988 5968679606412 6963628749852 7771293359981 9450409376819 9816370559976 11937359212824 13927257499704 15542586719962 18900818753638 23313880079943 28351228130457 31085173439924 37801637507276 46627760159886 56702456260914 62170346879848 75603275014552 93255520319772 113404912521828 179557778159561 186511040639544 226809825043656 359115556319122 538673334478683 718231112638244 1077346668957366 1436462225276488 2154693337914732 3411597785031659 4309386675829464 6823195570063318 10234793355094977 13646391140126636 20469586710189954 27292782280253272 40939173420379908 81878346840759816
• Sum of all divisors σ(n): 216596339688960000
• Sum of proper divisors (its aliquot sum) s(n): 134717992848200184
• 81878346840759816 is an abundant number, because the sum of its proper divisors (134717992848200184) is greater than itself. Its abundance is 52839646007440368

Bases of 81878346840759816

• Binary: 100100010111000111110110000110010001111010101111000001000₂
• Hexadecimal: 0x122E3EC323D5E08
• Base-36: ME7G99KPXJC

Squares and roots of 81878346840759816

• 81878346840759816 squared (81878346840759816²) is 6704063681375762941565740200353856
• 81878346840759816 cubed (81878346840759816³) is 548917651346225821349266535481112826755487105450496
• The square root of 81878346840759816 is 286143926.7934229911
• The cube root of 81878346840759816 is 434233.1967557391

Scales and comparisons

• 81,878,346,840,759,816 seconds is equal to 2,603,478,163 years, 9 weeks, 2 days, 16 hours, 23 minutes, 36 seconds.
• To count from 1 to 81,878,346,840,759,816 would take you about seven billion, eight hundred ten million, four hundred thirty-four thousand, four hundred eighty-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 81878346840759816 cubic inches would be around 36186.1 feet tall.

Recreational maths with 81878346840759816

• 81878346840759816 backwards is 61895704864387818
• The number of decimal digits it has is: 17
• The sum of 81878346840759816's digits is 93
• More coming soon!