2556385856 has 28 divisors (see below), whose sum is σ = 5339821680. Its totient is φ = 1210919040.

The previous prime is 2556385841. The next prime is 2556385859. The reversal of 2556385856 is 6585836552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2556385798 and 2556385807.

It is not an unprimeable number, because it can be changed into a prime (2556385859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049930 + ... + 1052361.

Almost surely, 2^2556385856 is an apocalyptic number.

It is an amenable number.

2556385856 is an abundant number, since it is smaller than the sum of its proper divisors (2783435824).

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

2556385856 is a wasteful number, since it uses less digits than its factorization.

2556385856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102322 (or 2102312 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 53.

The square root of 2556385856 is about 50560.7145519127. The cubic root of 2556385856 is about 1367.3366938107.

The spelling of 2556385856 in words is "two billion, five hundred fifty-six million, three hundred eighty-five thousand, eight hundred fifty-six".