56513371251 has 16 divisors (see below), whose sum is σ = 76629200000. Its totient is φ = 37038817728.

The previous prime is 56513371247. The next prime is 56513371261. The reversal of 56513371251 is 15217331565.

It is not a de Polignac number, because 56513371251 - 2² = 56513371247 is a prime.

It is a super-2 number, since 2×56513371251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56513371261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181426 + ... + 382023.

It is an arithmetic number, because the mean of its divisors is an integer number (4789325000).

Almost surely, 2^56513371251 is an apocalyptic number.

56513371251 is a deficient number, since it is larger than the sum of its proper divisors (20115828749).

56513371251 is a wasteful number, since it uses less digits than its factorization.

56513371251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564018.

The product of its digits is 94500, while the sum is 39.

The spelling of 56513371251 in words is "fifty-six billion, five hundred thirteen million, three hundred seventy-one thousand, two hundred fifty-one".