2556974938 has 12 divisors (see below), whose sum is σ = 4461660522. Its totient is φ = 1095846360.

The previous prime is 2556974911. The next prime is 2556974977. The reversal of 2556974938 is 8394796552.

It can be written as a sum of positive squares in only one way, i.e., 2013945129 + 543029809 = 44877^2 + 23303^2 .

It is a super-3 number, since 3×2556974938³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13045693 + ... + 13045888.

Almost surely, 2^2556974938 is an apocalyptic number.

2556974938 is a deficient number, since it is larger than the sum of its proper divisors (1904685584).

2556974938 is a wasteful number, since it uses less digits than its factorization.

2556974938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26091597 (or 26091590 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 58.

The square root of 2556974938 is about 50566.5397075972. The cubic root of 2556974938 is about 1367.4417133732.

The spelling of 2556974938 in words is "two billion, five hundred fifty-six million, nine hundred seventy-four thousand, nine hundred thirty-eight".