56510156520 has 128 divisors (see below), whose sum is σ = 188463945600. Its totient is φ = 15061635072.

The previous prime is 56510156513. The next prime is 56510156539. The reversal of 56510156520 is 2565101565.

56510156520 is a `hidden beast` number, since 5 + 65 + 10 + 1 + 565 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2269659 + ... + 2294421.

It is an arithmetic number, because the mean of its divisors is an integer number (1472374575).

Almost surely, 2^56510156520 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 56510156520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94231972800).

56510156520 is an abundant number, since it is smaller than the sum of its proper divisors (131953789080).

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

56510156520 is a wasteful number, since it uses less digits than its factorization.

56510156520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26896 (or 26886 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 56510156520 in words is "fifty-six billion, five hundred ten million, one hundred fifty-six thousand, five hundred twenty".