18399578815

Names of 18399578815

• Cardinal: 18399578815 can be written as Eighteen billion, three hundred ninety-nine million, five hundred seventy-eight thousand, eight hundred fifteen.

Scientific notation

• Scientific notation: 1.8399578815 × 10¹⁰

Factors of 18399578815

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 231

Divisors of 18399578815

• Number of divisors d(n): 72
• Complete list of divisors:
  1 5 19 29 41 95 137 145 205 551 685 779 841 1189 1681 2603 2755 3895 3973 4205 5617 5945 8405 13015 15979 19865 22591 28085 31939 34481 48749 75487 79895 106723 112955 115217 159695 162893 172405 230297 243745 377435 533615 576085 655139 814465 926231 1151485 1413721 2189123 3094967 3275695 4375643 4631155 4723897 6678613 7068605 10945615 15474835 21878215 23619485 26860699 33393065 89754043 126893647 134303495 193679777 448770215 634468235 968398885 3679915763 18399578815
• Sum of all divisors σ(n): 24852138480
• Sum of proper divisors (its aliquot sum) s(n): 6452559665
• 18399578815 is a deficient number, because the sum of its proper divisors (6452559665) is less than itself. Its deficiency is 11947019150

Bases of 18399578815

• Binary: 10001001000101100110100101010111111₂
• Hexadecimal: 0x448B34ABF
• Base-36: 8GAMTVJ

Squares and roots of 18399578815

• 18399578815 squared (18399578815²) is 338544500569396804225
• 18399578815 cubed (18399578815³) is 6229076220611428876347012493375
• The square root of 18399578815 is 135645.0471451131
• The cube root of 18399578815 is 2639.9920997143

Scales and comparisons

• 18,399,578,815 seconds is equal to 585 years, 2 weeks, 4 days, 2 hours, 6 minutes, 55 seconds.
• To count from 1 to 18,399,578,815 would take you about one thousand, one hundred seventy 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 18399578815 cubic inches would be around 220 feet tall.

Recreational maths with 18399578815

• 18399578815 backwards is 51887599381
• The number of decimal digits it has is: 11
• The sum of 18399578815's digits is 64
• More coming soon!