2656938128 has 20 divisors (see below), whose sum is σ = 5543804028. Its totient is φ = 1226279040.

The previous prime is 2656938113. The next prime is 2656938139. The reversal of 2656938128 is 8218396562.

It can be written as a sum of positive squares in 2 ways, for example, as 1660399504 + 996538624 = 40748^2 + 31568^2 .

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, 6386663 + ... + 6387078.

Almost surely, 2^2656938128 is an apocalyptic number.

It is an amenable number.

2656938128 is an abundant number, since it is smaller than the sum of its proper divisors (2886865900).

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

2656938128 is a wasteful number, since it uses less digits than its factorization.

2656938128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12773762 (or 12773756 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 2656938128 is about 51545.4957101006. The cubic root of 2656938128 is about 1385.0341458302.

The spelling of 2656938128 in words is "two billion, six hundred fifty-six million, nine hundred thirty-eight thousand, one hundred twenty-eight".