81488640142

Names of 81488640142

• Cardinal: 81488640142 can be written as Eighty-one billion, four hundred eighty-eight million, six hundred forty thousand, one hundred forty-two.

Scientific notation

• Scientific notation: 8.1488640142 × 10¹⁰

Factors of 81488640142

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 846434

Divisors of 81488640142

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 7 13 14 23 26 46 91 161 182 299 322 529 598 1058 2093 3703 4186 6877 7406 13754 48139 96278 846389 1692778 5924723 11003057 11849446 19466947 22006114 38933894 77021399 136268629 154042798 253070311 272537258 447739781 506140622 895479562 1771492177 3134178467 3542984354 5820617153 6268356934 11641234306 40744320071 81488640142
• Sum of all divisors σ(n): 157266033120
• Sum of proper divisors (its aliquot sum) s(n): 75777392978
• 81488640142 is a deficient number, because the sum of its proper divisors (75777392978) is less than itself. Its deficiency is 5711247164

Bases of 81488640142

• Binary: 1001011111001000110011111100010001110₂
• Hexadecimal: 0x12F919F88E
• Base-36: 11FO8D5A

Squares and roots of 81488640142

• 81488640142 squared (81488640142²) is 6640398472192373780164
• 81488640142 cubed (81488640142³) is 541117041499970940768540413743288
• The square root of 81488640142 is 285462.1518555481
• The cube root of 81488640142 is 4335.4317803835

Scales and comparisons

• 81,488,640,142 seconds is equal to 2,591 years, 4 weeks, 3 days, 13 hours, 22 minutes, 22 seconds.
• To count from 1 to 81,488,640,142 would take you about five thousand, one hundred eighty-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 81488640142 cubic inches would be around 361.3 feet tall.

Recreational maths with 81488640142

• 81488640142 backwards is 24104688418
• 81488640142 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81488640142's digits is 46
• More coming soon!