18157128808

Names of 18157128808

• Cardinal: 18157128808 can be written as Eighteen billion, one hundred fifty-seven million, one hundred twenty-eight thousand, eight hundred eight.

Scientific notation

• Scientific notation: 1.8157128808 × 10¹⁰

Factors of 18157128808

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 758

Divisors of 18157128808

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 52 53 56 91 104 106 169 182 212 338 364 371 424 676 683 689 728 742 1183 1352 1366 1378 1484 2366 2732 2756 2809 2968 4732 4781 4823 5464 5512 5618 8879 8957 9464 9562 9646 11236 17758 17914 19124 19292 19663 22472 35516 35828 36199 36517 38248 38584 39326 62153 62699 71032 71656 72398 73034 78652 115427 124306 125398 144796 146068 157304 230854 248612 250796 253393 255619 289592 292136 461708 470587 474721 497224 501592 506786 511238 807989 923416 941174 949442 1013572 1022476 1615978 1882348 1898884 1918547 2027144 2044952 3231956 3294109 3323047 3764696 3797768 3837094 6117631 6463912 6588218 6646094 7674188 12235262 13176436 13292188 13429829 15348376 24470524 24941111 26352872 26584376 26859658 42823417 48941048 49882222 53719316 85646834 99764444 107438632 171293668 174587777 199528888 324234443 342587336 349175554 648468886 698351108 1296937772 1396702216 2269641101 2593875544 4539282202 9078564404 18157128808
• Sum of all divisors σ(n): 43004092320
• Sum of proper divisors (its aliquot sum) s(n): 24846963512
• 18157128808 is an abundant number, because the sum of its proper divisors (24846963512) is greater than itself. Its abundance is 6689834704

Bases of 18157128808

• Binary: 10000111010001111111100110001101000₂
• Hexadecimal: 0x43A3FCC68
• Base-36: 8CAAA94

Squares and roots of 18157128808

• 18157128808 squared (18157128808²) is 329681326550303500864
• 18157128808 cubed (18157128808³) is 5986066311766170956680987290112
• The square root of 18157128808 is 134748.3907436375
• The cube root of 18157128808 is 2628.3451259431

Scales and comparisons

• 18,157,128,808 seconds is equal to 577 years, 17 weeks, 4 days, 22 hours, 53 minutes, 28 seconds.
• To count from 1 to 18,157,128,808 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 18157128808 cubic inches would be around 219 feet tall.

Recreational maths with 18157128808

• 18157128808 backwards is 80882175181
• The number of decimal digits it has is: 11
• The sum of 18157128808's digits is 49
• More coming soon!