644312920144720401

Names of 644312920144720401

• Cardinal: 644312920144720401 can be written as Six hundred forty-four quadrillion, three hundred twelve trillion, nine hundred twenty billion, one hundred forty-four million, seven hundred twenty thousand, four hundred one.

Scientific notation

• Scientific notation: 6.44312920144720401 × 10¹⁷

Factors of 644312920144720401

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 172319

Divisors of 644312920144720401

• Number of divisors d(n): 18
• Complete list of divisors:
  1 3 9 1567 4701 14103 170749 512247 1536741 267563683 802691049 2408073147 29155221001 87465663003 262396989009 45686231308567 137058693925701 411176081777103
• Sum of all divisors σ(n): 644496047568395682
• Sum of proper divisors (its aliquot sum) s(n): 183127423675281
• 644312920144720401 is a deficient number, because the sum of its proper divisors (183127423675281) is less than itself. Its deficiency is 644129792721045120

Bases of 644312920144720401

• Binary: 100011110001000011110010111111101001011010111011001000010001₂
• Hexadecimal: 0x8F10F2FE96BB211
• Base-36: 4W85V9A3JSI9

Squares and roots of 644312920144720401

• 644312920144720401 squared (644312920144720401²) is 415139139065416848324705834465600801
• 644312920144720401 cubed (644312920144720401³) is 267479510957603903237630215867275498217550288626641201
• 644312920144720401 is a perfect square number. Its square root is 802691049
• The cube root of 644312920144720401 is 863705.3572725277

Scales and comparisons

• 644,312,920,144,720,401 seconds is equal to 20,487,157,869 years, 45 weeks, 6 days, 23 hours, 13 minutes, 21 seconds.
• To count from 1 to 644,312,920,144,720,401 would take you about sixty-one billion, four hundred sixty-one million, four hundred seventy-three thousand, six hundred 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 644312920144720401 cubic inches would be around 71975.4 feet tall.

Recreational maths with 644312920144720401

• 644312920144720401 backwards is 104027441029213446
• The number of decimal digits it has is: 18
• The sum of 644312920144720401's digits is 54
• More coming soon!