2568578065 has 16 divisors (see below), whose sum is σ = 3116230992. Its totient is φ = 2032349184.

The previous prime is 2568578029. The next prime is 2568578087. The reversal of 2568578065 is 5608758652.

It can be written as a sum of positive squares in 8 ways, for example, as 30735936 + 2537842129 = 5544^2 + 50377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2568578065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182977 + ... + 196513.

It is an arithmetic number, because the mean of its divisors is an integer number (194764437).

Almost surely, 2^2568578065 is an apocalyptic number.

It is an amenable number.

2568578065 is a deficient number, since it is larger than the sum of its proper divisors (547652927).

2568578065 is a wasteful number, since it uses less digits than its factorization.

2568578065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956.

The product of its (nonzero) digits is 4032000, while the sum is 52.

The square root of 2568578065 is about 50681.1411177767. The cubic root of 2568578065 is about 1369.5070002290.

The spelling of 2568578065 in words is "two billion, five hundred sixty-eight million, five hundred seventy-eight thousand, sixty-five".