2556566984 has 16 divisors (see below), whose sum is σ = 4801879500. Its totient is φ = 1276065792.

The previous prime is 2556566977. The next prime is 2556567011. The reversal of 2556566984 is 4896656552.

It can be written as a sum of positive squares in 2 ways, for example, as 1934064484 + 622502500 = 43978^2 + 24950^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272309 + ... + 281540.

Almost surely, 2^2556566984 is an apocalyptic number.

It is an amenable number.

2556566984 is a deficient number, since it is larger than the sum of its proper divisors (2245312516).

2556566984 is a wasteful number, since it uses less digits than its factorization.

2556566984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554432 (or 554428 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 56.

The square root of 2556566984 is about 50562.5057132259. The cubic root of 2556566984 is about 1367.3689864204.

The spelling of 2556566984 in words is "two billion, five hundred fifty-six million, five hundred sixty-six thousand, nine hundred eighty-four".