6438739681

Names of 6438739681

• Cardinal: 6438739681 can be written as Six billion, four hundred thirty-eight million, seven hundred thirty-nine thousand, six hundred eighty-one.

Scientific notation

• Scientific notation: 6.438739681 × 10⁹

Factors of 6438739681

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 34431791

Divisors of 6438739681

• Number of divisors d(n): 8
• Complete list of divisors:
  1 11 17 187 34431763 378749393 585339971 6438739681
• Sum of all divisors σ(n): 7437261024
• Sum of proper divisors (its aliquot sum) s(n): 998521343
• 6438739681 is a deficient number, because the sum of its proper divisors (998521343) is less than itself. Its deficiency is 5440218338

Bases of 6438739681

• Binary: 101111111110001110101111011100001₂
• Hexadecimal: 0x17FC75EE1
• Base-36: 2YHGJC1

Squares and roots of 6438739681

• 6438739681 squared (6438739681²) is 41457368679683981761
• 6438739681 cubed (6438739681³) is 266933204787727831904630958241
• The square root of 6438739681 is 80241.7577137989
• The cube root of 6438739681 is 1860.3741183899

Scales and comparisons

• 6,438,739,681 seconds is equal to 204 years, 38 weeks, 10 hours, 48 minutes, 1 second.
• To count from 1 to 6,438,739,681 would take you about four 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 6438739681 cubic inches would be around 155 feet tall.

Recreational maths with 6438739681

• 6438739681 backwards is 1869378346
• The number of decimal digits it has is: 10
• The sum of 6438739681's digits is 55
• More coming soon!