189389390979932639721

Names of 189389390979932639721

• Cardinal: 189389390979932639721 can be written as One hundred eighty-nine quintillion, three hundred eighty-nine quadrillion, three hundred ninety trillion, nine hundred seventy-nine billion, nine hundred thirty-two million, six hundred thirty-nine thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.89389390979932639721 × 10²⁰

Factors of 189389390979932639721

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 8993

Divisors of 189389390979932639721

• Number of divisors d(n): 45
• Complete list of divisors:
  1 3 9 19 27 57 81 171 361 513 1083 1539 3249 8971 9747 26913 29241 80739 170449 242217 511347 726651 1534041 3238531 4602123 9715593 13806369 29146779 80478841 87440337 241436523 262321011 724309569 1529097979 2172928707 4587293937 6518786121 13761881811 29052861601 41285645433 87158584803 123856936299 261475754409 784427263227 2353281789681
• Sum of all divisors σ(n): 189389392337219517153
• Sum of proper divisors (its aliquot sum) s(n): 1357286877432
• 189389390979932639721 is a deficient number, because the sum of its proper divisors (1357286877432) is less than itself. Its deficiency is 189389389622645762289

Bases of 189389390979932639721

• Binary: 10100100010001001110010001111010101100010010011101000101000111101001₂
• Hexadecimal: 0xA444E47AB127451E9
• Base-36: 13YW3S1G8RS1K9

Squares and roots of 189389390979932639721

• 189389390979932639721 squared (189389390979932639721²) is 35868341415749790715967898770567186957841
• 189389390979932639721 cubed (189389390979932639721³) is 6793083336189147742274586348491191079701076762972454669002361
• 189389390979932639721 is a perfect square number. Its square root is 13761881811
• The cube root of 189389390979932639721 is 5742731.9990184875

Scales and comparisons

• 189,389,390,979,932,639,721 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
• To count from 1 to 189,389,390,979,932,639,721 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and nine 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 189389390979932639721 cubic inches would be around 478561 feet tall.

Recreational maths with 189389390979932639721

• 189389390979932639721 backwards is 127936239979093983981
• The number of decimal digits it has is: 21
• The sum of 189389390979932639721's digits is 117
• More coming soon!