18137870649

Names of 18137870649

• Cardinal: 18137870649 can be written as Eighteen billion, one hundred thirty-seven million, eight hundred seventy thousand, six hundred forty-nine.

Scientific notation

• Scientific notation: 1.8137870649 × 10¹⁰

Factors of 18137870649

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 63

Divisors of 18137870649

• Number of divisors d(n): 84
• Complete list of divisors:
  1 3 9 19 27 41 57 81 123 171 243 361 369 513 729 779 1083 1107 1539 1681 2337 3249 3321 4617 5043 7011 9747 9963 13851 14801 15129 21033 29241 29889 31939 44403 45387 63099 68921 87723 95817 133209 136161 189297 206763 263169 287451 399627 408483 567891 606841 620289 862353 1198881 1225449 1309499 1820523 1860867 2587059 3596643 3928497 5461569 5582601 7761177 10789929 11785491 16384707 16747803 23283531 24880481 35356473 49154121 50243409 74641443 106069419 147462363 223924329 318208257 442387089 671772987 954624771 2015318961 6045956883 18137870649
• Sum of all divisors σ(n): 29418492852
• Sum of proper divisors (its aliquot sum) s(n): 11280622203
• 18137870649 is a deficient number, because the sum of its proper divisors (11280622203) is less than itself. Its deficiency is 6857248446

Bases of 18137870649

• Binary: 10000111001000110011111000100111001₂
• Hexadecimal: 0x43919F139
• Base-36: 8BYTIK9

Squares and roots of 18137870649

• 18137870649 squared (18137870649²) is 328982351679855681201
• 18137870649 cubed (18137870649³) is 5967039340573050204611518969449
• The square root of 18137870649 is 134676.9120859251
• The cube root of 18137870649 is 2627.4155554349

Scales and comparisons

• 18,137,870,649 seconds is equal to 576 years, 37 weeks, 6 days, 1 hour, 24 minutes, 9 seconds.
• To count from 1 to 18,137,870,649 would take you about one thousand, one hundred fifty-three 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 18137870649 cubic inches would be around 219 feet tall.

Recreational maths with 18137870649

• 18137870649 backwards is 94607873181
• The number of decimal digits it has is: 11
• The sum of 18137870649's digits is 54
• More coming soon!