28557515264 has 40 divisors (see below), whose sum is σ = 57310849728. Its totient is φ = 14215797760.

The previous prime is 28557515251. The next prime is 28557515281. The reversal of 28557515264 is 46251575582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632 + ... + 239079.

Almost surely, 2^28557515264 is an apocalyptic number.

It is an amenable number.

28557515264 is an abundant number, since it is smaller than the sum of its proper divisors (28753334464).

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

28557515264 is an equidigital number, since it uses as much as digits as its factorization.

28557515264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245956 (or 245940 counting only the distinct ones).

The product of its digits is 3360000, while the sum is 50.

The spelling of 28557515264 in words is "twenty-eight billion, five hundred fifty-seven million, five hundred fifteen thousand, two hundred sixty-four".