56121157072 has 40 divisors (see below), whose sum is σ = 110375471232. Its totient is φ = 27637948800.

The previous prime is 56121157067. The next prime is 56121157093. The reversal of 56121157072 is 27075112165.

It is a super-2 number, since 2×56121157072² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 1147258 + ... + 1195174.

Almost surely, 2^56121157072 is an apocalyptic number.

It is an amenable number.

56121157072 is a deficient number, since it is larger than the sum of its proper divisors (54254314160).

56121157072 is a wasteful number, since it uses less digits than its factorization.

56121157072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49027 (or 49021 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

The spelling of 56121157072 in words is "fifty-six billion, one hundred twenty-one million, one hundred fifty-seven thousand, seventy-two".