161398721488926358529

Names of 161398721488926358529

• Cardinal: 161398721488926358529 can be written as One hundred sixty-one quintillion, three hundred ninety-eight quadrillion, seven hundred twenty-one trillion, four hundred eighty-eight billion, nine hundred twenty-six million, three hundred fifty-eight thousand, five hundred twenty-nine.

Scientific notation

• Scientific notation: 1.61398721488926358529 × 10²⁰

Factors of 161398721488926358529

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 36690

Divisors of 161398721488926358529

• Number of divisors d(n): 12
• Complete list of divisors:
  1 149 22201 36541 3307949 5444609 811246741 1335244681 120875764409 198951457469 29643767162881 4416921307269269
• Sum of all divisors σ(n): 161398751454676046160
• Sum of proper divisors (its aliquot sum) s(n): 29965749687631
• 161398721488926358529 is a deficient number, because the sum of its proper divisors (29965749687631) is less than itself. Its deficiency is 161398691523176670898

Bases of 161398721488926358529

• Binary: 10001011111111011011011100100001000100101101101010010011110000000001₂
• Hexadecimal: 0x8BFDB72112DA93C01
• Base-36: Y28CFT0YOH0CH

Squares and roots of 161398721488926358529

• 161398721488926358529 squared (161398721488926358529²) is 26049547298260019098585066882428251043841
• 161398721488926358529 cubed (161398721488926358529³) is 4204363629304482909814424100184566899906411687340423263269889
• The square root of 161398721488926358529 is 12704279652.5000329721
• 161398721488926358529 is a perfect cube number. Its cube root is 5444609

Scales and comparisons

• 161,398,721,488,926,358,529 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
• To count from 1 to 161,398,721,488,926,358,529 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 161398721488926358529 cubic inches would be around 453717.4 feet tall.

Recreational maths with 161398721488926358529

• 161398721488926358529 backwards is 925853629884127893161
• The number of decimal digits it has is: 21
• The sum of 161398721488926358529's digits is 107
• More coming soon!