18161228538

Names of 18161228538

• Cardinal: 18161228538 can be written as Eighteen billion, one hundred sixty-one million, two hundred twenty-eight thousand, five hundred thirty-eight.

Scientific notation

• Scientific notation: 1.8161228538 × 10¹⁰

Factors of 18161228538

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2587

Divisors of 18161228538

• Number of divisors d(n): 88
• Complete list of divisors:
  1 2 3 6 9 18 27 54 61 81 122 162 183 243 366 486 549 729 1098 1458 1647 2187 2521 3294 4374 4941 5042 6561 7563 9882 13122 14823 15126 19683 22689 29646 39366 44469 45378 59049 68067 88938 118098 133407 136134 153781 204201 266814 307562 400221 408402 461343 612603 800442 922686 1200663 1225206 1384029 1837809 2401326 2768058 3601989 3675618 4152087 5513427 7203978 8304174 11026854 12456261 16540281 24912522 33080562 37368783 49620843 74737566 99241686 112106349 148862529 224212698 297725058 336319047 672638094 1008957141 2017914282 3026871423 6053742846 9080614269 18161228538
• Sum of all divisors σ(n): 41548885716
• Sum of proper divisors (its aliquot sum) s(n): 23387657178
• 18161228538 is an abundant number, because the sum of its proper divisors (23387657178) is greater than itself. Its abundance is 5226428640

Bases of 18161228538

• Binary: 10000111010011111100101101011111010₂
• Hexadecimal: 0x43A7E5AFA
• Base-36: 8CCQ5MI

Squares and roots of 18161228538

• 18161228538 squared (18161228538²) is 329830222009465617444
• 18161228538 cubed (18161228538³) is 5990122040653182677653763416872
• The square root of 18161228538 is 134763.6024229095
• The cube root of 18161228538 is 2628.5429306107

Scales and comparisons

• 18,161,228,538 seconds is equal to 577 years, 24 weeks, 3 days, 9 hours, 42 minutes, 18 seconds.
• To count from 1 to 18,161,228,538 would take you about one thousand, one hundred fifty-four 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 18161228538 cubic inches would be around 219 feet tall.

Recreational maths with 18161228538

• 18161228538 backwards is 83582216181
• The number of decimal digits it has is: 11
• The sum of 18161228538's digits is 45
• More coming soon!