Base | Representation |
---|---|
bin | 10010100000000101100110… |
… | …101001101000100100000000 |
3 | 101200002212212200021000001110 |
4 | 102200011212221220210000 |
5 | 41131131002132102200 |
6 | 445020450012003320 |
7 | 23065531264525500 |
oct | 2240054651504400 |
9 | 350085780230043 |
10 | 81369877612800 |
11 | 23a21853671057 |
12 | 916203b460540 |
13 | 36531b9c2262a |
14 | 16144747b7a00 |
15 | 96193d346b50 |
hex | 4a0166a68900 |
81369877612800 has 648 divisors, whose sum is σ = 312662638789536. Its totient is φ = 18582026158080.
The previous prime is 81369877612787. The next prime is 81369877612883. The reversal of 81369877612800 is 821677896318.
It is an unprimeable number.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1056479892 + ... + 1056556908.
Almost surely, 281369877612800 is an apocalyptic number.
81369877612800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 81369877612800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156331319394768).
81369877612800 is an abundant number, since it is smaller than the sum of its proper divisors (231292761176736).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
81369877612800 is a wasteful number, since it uses less digits than its factorization.
81369877612800 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 78183 (or 78157 counting only the distinct ones).
The product of its (nonzero) digits is 48771072, while the sum is 66.
The spelling of 81369877612800 in words is "eighty-one trillion, three hundred sixty-nine billion, eight hundred seventy-seven million, six hundred twelve thousand, eight hundred".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.066 sec. • engine limits •