56157067520 has 72 divisors (see below), whose sum is σ = 135481879680. Its totient is φ = 22301153280.

The previous prime is 56157067507. The next prime is 56157067537. The reversal of 56157067520 is 2576075165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20105 + ... + 335735.

Almost surely, 2^56157067520 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 56157067520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67740939840).

56157067520 is an abundant number, since it is smaller than the sum of its proper divisors (79324812160).

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

56157067520 is a wasteful number, since it uses less digits than its factorization.

56157067520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315791 (or 315777 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 56157067520 in words is "fifty-six billion, one hundred fifty-seven million, sixty-seven thousand, five hundred twenty".