2566405256 has 16 divisors (see below), whose sum is σ = 4813203600. Its totient is φ = 1282884304.

The previous prime is 2566405243. The next prime is 2566405271. The reversal of 2566405256 is 6525046652.

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, 3590 + ... + 71733.

It is an arithmetic number, because the mean of its divisors is an integer number (300825225).

Almost surely, 2^2566405256 is an apocalyptic number.

It is an amenable number.

2566405256 is a deficient number, since it is larger than the sum of its proper divisors (2246798344).

2566405256 is a wasteful number, since it uses less digits than its factorization.

2566405256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79588 (or 79584 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The square root of 2566405256 is about 50659.7005123402. The cubic root of 2566405256 is about 1369.1207272905.

The spelling of 2566405256 in words is "two billion, five hundred sixty-six million, four hundred five thousand, two hundred fifty-six".