2568257128 has 16 divisors (see below), whose sum is σ = 4859662500. Its totient is φ = 1272347136.

The previous prime is 2568257089. The next prime is 2568257161. The reversal of 2568257128 is 8217528652.

It can be written as a sum of positive squares in 2 ways, for example, as 2363709924 + 204547204 = 48618^2 + 14302^2 .

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, 1471753 + ... + 1473496.

Almost surely, 2^2568257128 is an apocalyptic number.

It is an amenable number.

2568257128 is a deficient number, since it is larger than the sum of its proper divisors (2291405372).

2568257128 is a wasteful number, since it uses less digits than its factorization.

2568257128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945364 (or 2945360 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 2568257128 is about 50677.9747819504. The cubic root of 2568257128 is about 1369.4499591004.

The spelling of 2568257128 in words is "two billion, five hundred sixty-eight million, two hundred fifty-seven thousand, one hundred twenty-eight".