81027657018

Names of 81027657018

• Cardinal: 81027657018 can be written as Eighty-one billion, twenty-seven million, six hundred fifty-seven thousand and eighteen.

Scientific notation

• Scientific notation: 8.1027657018 × 10¹⁰

Factors of 81027657018

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 23

Divisors of 81027657018

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 7 9 11 14 18 21 22 27 33 42 54 63 66 77 99 121 126 154 189 198 231 242 297 363 378 462 594 693 726 847 1089 1331 1386 1694 2079 2178 2541 2662 3267 3993 4158 5082 6534 7623 7986 9317 11979 14641 15246 18634 22869 23958 27951 29282 35937 43923 45738 55902 71874 83853 87846 102487 131769 161051 167706 204974 251559 263538 307461 322102 395307 483153 503118 614922 790614 922383 966306 1127357 1449459 1771561 1844766 2254714 2767149 2898918 3382071 3543122 4348377 5314683 5534298 6764142 8696754 10146213 10629366 12400927 15944049 19487171 20292426 24801854 30438639 31888098 37202781 38974342 47832147 58461513 60877278 74405562 95664294 111608343 116923026 136410197 175384539 214358881 223216686 272820394 334825029 350769078 409230591 428717762 526153617 643076643 669650058 818461182 1052307234 1227691773 1286153286 1500512167 1929229929 2455383546 3001024334 3683075319 3858459858 4501536501 5787689787 7366150638 9003073002 11575379574 13504609503 27009219006 40513828509 81027657018
• Sum of all divisors σ(n): 226362978240
• Sum of proper divisors (its aliquot sum) s(n): 145335321222
• 81027657018 is an abundant number, because the sum of its proper divisors (145335321222) is greater than itself. Its abundance is 64307664204

Bases of 81027657018

• Binary: 1001011011101100111111110110100111010₂
• Hexadecimal: 0x12DD9FED3A
• Base-36: 1181RWAI

Squares and roots of 81027657018

• 81027657018 squared (81027657018²) is 6565481201826644652324
• 81027657018 cubed (81027657018³) is 531985558979735797982272928609832
• The square root of 81027657018 is 284653.5736961685
• The cube root of 81027657018 is 4327.2411033087

Scales and comparisons

• 81,027,657,018 seconds is equal to 2,576 years, 22 weeks, 2 days, 2 hours, 30 minutes, 18 seconds.
• To count from 1 to 81,027,657,018 would take you about five thousand, one hundred fifty-two 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 81027657018 cubic inches would be around 360.6 feet tall.

Recreational maths with 81027657018

• 81027657018 backwards is 81075672018
• The number of decimal digits it has is: 11
• The sum of 81027657018's digits is 45
• More coming soon!