2556838172 has 24 divisors (see below), whose sum is σ = 5114817120. Its totient is φ = 1095543360.

The previous prime is 2556838169. The next prime is 2556838201. The reversal of 2556838172 is 2718386552.

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, 179654 + ... + 193362.

It is an arithmetic number, because the mean of its divisors is an integer number (213117380).

Almost surely, 2^2556838172 is an apocalyptic number.

It is an amenable number.

2556838172 is an abundant number, since it is smaller than the sum of its proper divisors (2557978948).

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

2556838172 is a wasteful number, since it uses less digits than its factorization.

2556838172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20381 (or 20379 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 2556838172 is about 50565.1873525650. The cubic root of 2556838172 is about 1367.4173326274.

The spelling of 2556838172 in words is "two billion, five hundred fifty-six million, eight hundred thirty-eight thousand, one hundred seventy-two".