2556656004 has 24 divisors (see below), whose sum is σ = 6817749568. Its totient is φ = 730473120.

The previous prime is 2556655961. The next prime is 2556656033. The reversal of 2556656004 is 4006566552.

It is a happy 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, 15218107 + ... + 15218274.

Almost surely, 2^2556656004 is an apocalyptic number.

It is an amenable number.

2556656004 is an abundant number, since it is smaller than the sum of its proper divisors (4261093564).

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

2556656004 is a wasteful number, since it uses less digits than its factorization.

2556656004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30436395 (or 30436393 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 2556656004 is about 50563.3860021261. The cubic root of 2556656004 is about 1367.3848568924.

The spelling of 2556656004 in words is "two billion, five hundred fifty-six million, six hundred fifty-six thousand, four".