638946616129

Names of 638946616129

• Cardinal: 638946616129 can be written as Six hundred thirty-eight billion, nine hundred forty-six million, six hundred sixteen thousand, one hundred twenty-nine.

Scientific notation

• Scientific notation: 6.38946616129 × 10¹¹

Factors of 638946616129

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 744707

Divisors of 638946616129

• Number of divisors d(n): 8
• Complete list of divisors:
  1 113 7673 736921 867049 83272073 5654394833 638946616129
• Sum of all divisors σ(n): 644685894792
• Sum of proper divisors (its aliquot sum) s(n): 5739278663
• 638946616129 is a deficient number, because the sum of its proper divisors (5739278663) is less than itself. Its deficiency is 633207337466

Bases of 638946616129

• Binary: 1001010011000100001011111010001101000001₂
• Hexadecimal: 0x94C42FA341
• Base-36: 85J0BGAP

Squares and roots of 638946616129

• 638946616129 squared (638946616129²) is 408252778262699682944641
• 638946616129 cubed (638946616129³) is 260851731196214929837639541384714689
• The square root of 638946616129 is 799341.3639547249
• The cube root of 638946616129 is 8613.0081497175

Scales and comparisons

• 638,946,616,129 seconds is equal to 20,316 years, 27 weeks, 2 days, 11 hours, 8 minutes, 49 seconds.
• To count from 1 to 638,946,616,129 would take you about forty thousand, six hundred thirty-three 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 638946616129 cubic inches would be around 717.8 feet tall.

Recreational maths with 638946616129

• 638946616129 backwards is 921616649836
• The number of decimal digits it has is: 12
• The sum of 638946616129's digits is 61
• More coming soon!