138123878647426891

Names of 138123878647426891

• Cardinal: 138123878647426891 can be written as One hundred thirty-eight quadrillion, one hundred twenty-three trillion, eight hundred seventy-eight billion, six hundred forty-seven million, four hundred twenty-six thousand, eight hundred ninety-one.

Scientific notation

• Scientific notation: 1.38123878647426891 × 10¹⁷

Factors of 138123878647426891

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 102527142092

Divisors of 138123878647426891

• Number of divisors d(n): 4
• Complete list of divisors:
  1 1347211 102525794881 138123878647426891
• Sum of all divisors σ(n): 138123981174568984
• Sum of proper divisors (its aliquot sum) s(n): 102527142093
• 138123878647426891 is a deficient number, because the sum of its proper divisors (102527142093) is less than itself. Its deficiency is 138123776120284798

Bases of 138123878647426891

• Binary: 111101010101101101110111110010001110001110110111101001011₂
• Hexadecimal: 0x1EAB6EF91C76F4B
• Base-36: 11S0TTV9TAH7

Squares and roots of 138123878647426891

• 138123878647426891 squared (138123878647426891²) is 19078205852609110231968175189925881
• 138123878647426891 cubed (138123878647426891³) is 2635155789996410224381644405575393690443565656265971
• The square root of 138123878647426891 is 371650210.0731639449
• The cube root of 138123878647426891 is 516919.5073483701

Scales and comparisons

• 138,123,878,647,426,891 seconds is equal to 4,391,912,095 years, 40 weeks, 3 days, 17 hours, 41 minutes, 31 seconds.
• To count from 1 to 138,123,878,647,426,891 would take you about thirteen billion, one hundred seventy-five million, seven hundred thirty-six thousand, two hundred eighty-seven 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 138123878647426891 cubic inches would be around 43076.6 feet tall.

Recreational maths with 138123878647426891

• 138123878647426891 backwards is 198624746878321831
• The number of decimal digits it has is: 18
• The sum of 138123878647426891's digits is 88
• More coming soon!