2556634944 has 56 divisors (see below), whose sum is σ = 6824350080. Its totient is φ = 844662784.

The previous prime is 2556634919. The next prime is 2556634957. The reversal of 2556634944 is 4494366552.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 2556634893 and 2556634902.

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, 37224 + ... + 80615.

Almost surely, 2^2556634944 is an apocalyptic number.

2556634944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2556634944 is an abundant number, since it is smaller than the sum of its proper divisors (4267715136).

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

2556634944 is a wasteful number, since it uses less digits than its factorization.

2556634944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117967 (or 117957 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The square root of 2556634944 is about 50563.1777482389. The cubic root of 2556634944 is about 1367.3811023521.

The spelling of 2556634944 in words is "two billion, five hundred fifty-six million, six hundred thirty-four thousand, nine hundred forty-four".