1638343780491890

Names of 1638343780491890

• Cardinal: 1638343780491890 can be written as One quadrillion, six hundred thirty-eight trillion, three hundred forty-three billion, seven hundred eighty million, four hundred ninety-one thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 1.63834378049189 × 10¹⁵

Factors of 1638343780491890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1399359

Divisors of 1638343780491890

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 10 29 58 145 157 290 314 785 1570 4553 9106 22765 26209 45530 52418 131045 262090 760061 1372957 1520122 2745914 3800305 4114813 6864785 7600610 8229626 13729570 20574065 39815753 41148130 79631506 119329577 199078765 215554249 238659154 398157530 431108498 596647885 1077771245 1193295770 2155542490 6251073221 12502146442 31255366105 35983830013 62510732210 71967660026 179919150065 359838300130 1043531070377 2087062140754 5217655351885 5649461312041 10435310703770 11298922624082 28247306560205 56494613120410 163834378049189 327668756098378 819171890245945 1638343780491890
• Sum of all divisors σ(n): 3070259753637600
• Sum of proper divisors (its aliquot sum) s(n): 1431915973145710
• 1638343780491890 is a deficient number, because the sum of its proper divisors (1431915973145710) is less than itself. Its deficiency is 206427807346180

Bases of 1638343780491890

• Binary: 101110100100001000010100011000011100110001001110010₂
• Hexadecimal: 0x5D210A30E6272
• Base-36: G4QSQQ4E42

Squares and roots of 1638343780491890

• 1638343780491890 squared (1638343780491890²) is 2684170343076458244130355772100
• 1638343780491890 cubed (1638343780491890³) is 4397593787360097978756568934112413238738269000
• The square root of 1638343780491890 is 40476459.5844534061
• The cube root of 1638343780491890 is 117887.6595397755

Scales and comparisons

• 1,638,343,780,491,890 seconds is equal to 52,094,264 years, 25 weeks, 3 days, 5 hours, 4 minutes, 50 seconds.
• To count from 1 to 1,638,343,780,491,890 would take you about one hundred fifty-six million, two hundred eighty-two thousand, seven hundred ninety-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 1638343780491890 cubic inches would be around 9824 feet tall.

Recreational maths with 1638343780491890

• 1638343780491890 backwards is 0981940873438361
• The number of decimal digits it has is: 16
• The sum of 1638343780491890's digits is 74
• More coming soon!