81121304180

Names of 81121304180

• Cardinal: 81121304180 can be written as Eighty-one billion, one hundred twenty-one million, three hundred four thousand, one hundred eighty.

Scientific notation

• Scientific notation: 8.112130418 × 10¹⁰

Factors of 81121304180

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1339

Divisors of 81121304180

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 35 49 70 71 98 140 142 151 196 245 284 302 343 355 490 497 604 686 710 755 980 994 1057 1103 1372 1420 1510 1715 1988 2114 2206 2485 3020 3430 3479 4228 4412 4970 5285 5515 6860 6958 7399 7721 9940 10570 10721 11030 13916 14798 15442 17395 21140 21442 22060 24353 29596 30884 34790 36995 38605 42884 48706 51793 53605 54047 69580 73990 75047 77210 78313 97412 103586 107210 108094 121765 147980 150094 154420 156626 166553 207172 214420 216188 243530 258965 270235 300188 313252 333106 375235 378329 391565 487060 517930 525329 540470 548191 666212 750470 756658 783130 832765 1035860 1050658 1080940 1096382 1165871 1500940 1513316 1566260 1665530 1891645 2101316 2192764 2331742 2626645 2740955 3331060 3677303 3783290 3837337 4663484 5253290 5481910 5829355 7354606 7566580 7674674 8161097 10506580 10963820 11658710 11825263 14709212 15349348 16322194 18386515 19186685 23317420 23650526 26861359 32644388 36773030 38373370 40805485 47301052 53722718 57127679 59126315 73546060 76746740 81610970 82776841 107445436 114255358 118252630 134306795 163221940 165553682 228510716 236505260 268613590 285638395 331107364 413884205 537227180 571276790 579437887 827768410 1142553580 1158875774 1655536820 2317751548 2897189435 4056065209 5794378870 8112130418 11588757740 16224260836 20280326045 40560652090 81121304180
• Sum of all divisors σ(n): 202980556800
• Sum of proper divisors (its aliquot sum) s(n): 121859252620
• 81121304180 is an abundant number, because the sum of its proper divisors (121859252620) is greater than itself. Its abundance is 40737948440

Bases of 81121304180

• Binary: 1001011100011001101001101111001110100₂
• Hexadecimal: 0x12E334DE74
• Base-36: 119LJ2WK

Squares and roots of 81121304180

• 81121304180 squared (81121304180²) is 6580665991864085472400
• 81121304180 cubed (81121304180³) is 533832207632987882824079394632000
• The square root of 81121304180 is 284818.0194088851
• The cube root of 81121304180 is 4328.9075212877

Scales and comparisons

• 81,121,304,180 seconds is equal to 2,579 years, 21 weeks, 23 hours, 36 minutes, 20 seconds.
• To count from 1 to 81,121,304,180 would take you about five thousand, one hundred fifty-eight 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 81121304180 cubic inches would be around 360.7 feet tall.

Recreational maths with 81121304180

• 81121304180 backwards is 08140312118
• The number of decimal digits it has is: 11
• The sum of 81121304180's digits is 29
• More coming soon!