13721978865

Names of 13721978865

• Cardinal: 13721978865 can be written as Thirteen billion, seven hundred twenty-one million, nine hundred seventy-eight thousand, eight hundred sixty-five.

Scientific notation

• Scientific notation: 1.3721978865 × 10¹⁰

Factors of 13721978865

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 404

Divisors of 13721978865

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 7 15 21 29 35 49 79 87 105 145 147 203 237 245 281 395 435 553 609 735 841 843 1015 1185 1405 1421 1659 1967 2291 2523 2765 3045 3871 4205 4215 4263 5887 5901 6873 7105 8149 8295 9835 11455 11613 12615 13769 16037 17661 19355 21315 22199 24447 29435 29505 34365 40745 41209 41307 48111 57043 58065 66439 66597 68845 80185 88305 110995 112259 122235 123627 155393 171129 199317 206045 206535 236321 240555 285215 332195 332985 336777 399301 465073 466179 561295 618135 643771 708963 776965 855645 996585 1087751 1181605 1197903 1395219 1654247 1683885 1931313 1996505 2325365 2330895 3218855 3255511 3263253 3544815 4506397 4962741 5438755 5989515 6976095 8271235 9656565 9766533 11579729 13519191 16277555 16316265 18669359 22531985 24813705 31544779 34739187 48832665 56008077 57898645 67595955 93346795 94634337 130685513 157723895 173695935 280040385 392056539 473171685 653427565 914798591 1960282695 2744395773 4573992955 13721978865
• Sum of all divisors σ(n): 26880871680
• Sum of proper divisors (its aliquot sum) s(n): 13158892815
• 13721978865 is a deficient number, because the sum of its proper divisors (13158892815) is less than itself. Its deficiency is 563086050

Bases of 13721978865

• Binary: 1100110001111001001100011111110001₂
• Hexadecimal: 0x331E4C7F1
• Base-36: 6AXPMNL

Squares and roots of 13721978865

• 13721978865 squared (13721978865²) is 188292703971506688225
• 13721978865 cubed (13721978865³) is 2583748504330716338029594364625
• The square root of 13721978865 is 117140.8505389983
• The cube root of 13721978865 is 2394.0814154453

Scales and comparisons

• 13,721,978,865 seconds is equal to 436 years, 16 weeks, 3 days, 4 hours, 47 minutes, 45 seconds.
• To count from 1 to 13,721,978,865 would take you about eight hundred seventy-two 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 13721978865 cubic inches would be around 199.5 feet tall.

Recreational maths with 13721978865

• 13721978865 backwards is 56887912731
• The number of decimal digits it has is: 11
• The sum of 13721978865's digits is 57
• More coming soon!