56591228556 has 24 divisors (see below), whose sum is σ = 146718000240. Its totient is φ = 18863742816.

The previous prime is 56591228527. The next prime is 56591228597. The reversal of 56591228556 is 65582219565.

It is a happy number.

56591228556 is a `hidden beast` number, since 5 + 6 + 59 + 12 + 28 + 556 = 666.

56591228556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 261996321 + ... + 261996536.

It is an arithmetic number, because the mean of its divisors is an integer number (6113250010).

Almost surely, 2^56591228556 is an apocalyptic number.

It is an amenable number.

56591228556 is an abundant number, since it is smaller than the sum of its proper divisors (90126771684).

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

56591228556 is a wasteful number, since it uses less digits than its factorization.

56591228556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523992870 (or 523992862 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 54.

The spelling of 56591228556 in words is "fifty-six billion, five hundred ninety-one million, two hundred twenty-eight thousand, five hundred fifty-six".