1643143968721921

Names of 1643143968721921

• Cardinal: 1643143968721921 can be written as One quadrillion, six hundred forty-three trillion, one hundred forty-three billion, nine hundred sixty-eight million, seven hundred twenty-one thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 1.643143968721921 × 10¹⁵

Factors of 1643143968721921

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 409237523

Divisors of 1643143968721921

• Number of divisors d(n): 8
• Complete list of divisors:
  1 241 16661 4015301 409220621 98622169661 6818024766481 1643143968721921
• Sum of all divisors σ(n): 1650061028910888
• Sum of proper divisors (its aliquot sum) s(n): 6917060188967
• 1643143968721921 is a deficient number, because the sum of its proper divisors (6917060188967) is less than itself. Its deficiency is 1636226908532954

Bases of 1643143968721921

• Binary: 101110101100110111001000100100100100000110000000001₂
• Hexadecimal: 0x5D66E44920C01
• Base-36: G6G1X2991D

Squares and roots of 1643143968721921

• 1643143968721921 squared (1643143968721921²) is 2699922101947225297566225930241
• 1643143968721921 cubed (1643143968721921³) is 4436360717833594765792792051844995326073512961
• The square root of 1643143968721921 is 40535712.2636561179
• The cube root of 1643143968721921 is 118002.6804122031

Scales and comparisons

• 1,643,143,968,721,921 seconds is equal to 52,246,895 years, 32 weeks, 4 days, 8 hours, 32 minutes, 1 second.
• To count from 1 to 1,643,143,968,721,921 would take you about one hundred fifty-six million, seven hundred forty thousand, six hundred eighty-six 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 1643143968721921 cubic inches would be around 9833.6 feet tall.

Recreational maths with 1643143968721921

• 1643143968721921 backwards is 1291278693413461
• The number of decimal digits it has is: 16
• The sum of 1643143968721921's digits is 67
• More coming soon!