2568857128 has 8 divisors (see below), whose sum is σ = 4816607130. Its totient is φ = 1284428560.

The previous prime is 2568857119. The next prime is 2568857153. The reversal of 2568857128 is 8217588652.

It can be written as a sum of positive squares in only one way, i.e., 1769211844 + 799645284 = 42062^2 + 28278^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160553563 + ... + 160553578.

Almost surely, 2^2568857128 is an apocalyptic number.

It is an amenable number.

2568857128 is a deficient number, since it is larger than the sum of its proper divisors (2247750002).

2568857128 is a wasteful number, since it uses less digits than its factorization.

2568857128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321107147 (or 321107143 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 52.

The square root of 2568857128 is about 50683.8941676742. The cubic root of 2568857128 is about 1369.5565950998.

The spelling of 2568857128 in words is "two billion, five hundred sixty-eight million, eight hundred fifty-seven thousand, one hundred twenty-eight".