56512406920 has 64 divisors (see below), whose sum is σ = 129404609280. Its totient is φ = 22206514176.

The previous prime is 56512406897. The next prime is 56512406947. The reversal of 56512406920 is 2960421565.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 954832 + ... + 1012288.

It is an arithmetic number, because the mean of its divisors is an integer number (2021947020).

Almost surely, 2^56512406920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56512406920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64702304640).

56512406920 is an abundant number, since it is smaller than the sum of its proper divisors (72892202360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56512406920 is a wasteful number, since it uses less digits than its factorization.

56512406920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57902 (or 57898 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 56512406920 in words is "fifty-six billion, five hundred twelve million, four hundred six thousand, nine hundred twenty".