18156169890

Names of 18156169890

• Cardinal: 18156169890 can be written as Eighteen billion, one hundred fifty-six million, one hundred sixty-nine thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 1.815616989 × 10¹⁰

Factors of 18156169890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1805

Divisors of 18156169890

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 30 45 90 499 523 773 998 1046 1497 1546 1569 2319 2495 2615 2994 3138 3865 4491 4638 4707 4990 5230 6957 7485 7730 7845 8982 9414 11595 13914 14970 15690 22455 23190 23535 34785 44910 47070 69570 260977 385727 404279 521954 771454 782931 808558 1157181 1212837 1304885 1565862 1928635 2021395 2314362 2348793 2425674 2609770 3471543 3638511 3857270 3914655 4042790 4697586 5785905 6064185 6943086 7277022 7829310 11571810 11743965 12128370 17357715 18192555 23487930 34715430 36385110 201735221 403470442 605205663 1008676105 1210411326 1815616989 2017352210 3026028315 3631233978 6052056630 9078084945 18156169890
• Sum of all divisors σ(n): 47452392000
• Sum of proper divisors (its aliquot sum) s(n): 29296222110
• 18156169890 is an abundant number, because the sum of its proper divisors (29296222110) is greater than itself. Its abundance is 11140052220

Bases of 18156169890

• Binary: 10000111010001100010010101010100010₂
• Hexadecimal: 0x43A312AA2
• Base-36: 8C9PQCI

Squares and roots of 18156169890

• 18156169890 squared (18156169890²) is 329646505074542612100
• 18156169890 cubed (18156169890³) is 5985117949778142779331969669000
• The square root of 18156169890 is 134744.8325168725
• The cube root of 18156169890 is 2628.2988555621

Scales and comparisons

• 18,156,169,890 seconds is equal to 577 years, 16 weeks, 20 hours, 31 minutes, 30 seconds.
• To count from 1 to 18,156,169,890 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 18156169890 cubic inches would be around 219 feet tall.

Recreational maths with 18156169890

• 18156169890 backwards is 09896165181
• The number of decimal digits it has is: 11
• The sum of 18156169890's digits is 54
• More coming soon!