640665027096551638

Names of 640665027096551638

• Cardinal: 640665027096551638 can be written as Six hundred forty quadrillion, six hundred sixty-five trillion, twenty-seven billion, ninety-six million, five hundred fifty-one thousand, six hundred thirty-eight.

Scientific notation

• Scientific notation: 6.40665027096551638 × 10¹⁷

Factors of 640665027096551638

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 377308012

Divisors of 640665027096551638

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 79 158 193 386 15247 30494 55691 111382 4399589 8799178 10748363 21496726 377252047 754504094 849120677 1698241354 29802911713 59605823426 72809645071 145619290142 5751961960609 11503923921218 21009543749477 42019087498954 1659753956208683 3319507912417366 4054841943649061 8109683887298122 320332513548275819 640665027096551638
• Sum of all divisors σ(n): 978221924423976960
• Sum of proper divisors (its aliquot sum) s(n): 337556897327425322
• 640665027096551638 is a deficient number, because the sum of its proper divisors (337556897327425322) is less than itself. Its deficiency is 303108129769126316

Bases of 640665027096551638

• Binary: 100011100100000110010111001010100000000110110010000011010110₂
• Hexadecimal: 0x8E41972A01B20D6
• Base-36: 4V88SQCKH6TY

Squares and roots of 640665027096551638

• 640665027096551638 squared (640665027096551638²) is 410451676944625244541650670800483044
• 640665027096551638 cubed (640665027096551638³) is 262962034731553391528008632289606512486887597089426072
• The square root of 640665027096551638 is 800415534.0175199513
• The cube root of 640665027096551638 is 862072.2638192481

Scales and comparisons

• 640,665,027,096,551,638 seconds is equal to 20,371,166,154 years, 32 weeks, 4 days, 3 hours, 53 minutes, 58 seconds.
• To count from 1 to 640,665,027,096,551,638 would take you about sixty-one billion, one hundred thirteen million, four hundred ninety-eight thousand, four hundred sixty-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 640665027096551638 cubic inches would be around 71839.4 feet tall.

Recreational maths with 640665027096551638

• 640665027096551638 backwards is 836155690720566046
• 640665027096551638 is a Harshad number.
• The number of decimal digits it has is: 18
• The sum of 640665027096551638's digits is 79
• More coming soon!