2565863812 has 24 divisors (see below), whose sum is σ = 4534510400. Its totient is φ = 1270352160.

The previous prime is 2565863723. The next prime is 2565863837. The reversal of 2565863812 is 2183685652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160318 + ... + 175594.

Almost surely, 2^2565863812 is an apocalyptic number.

It is an amenable number.

2565863812 is a deficient number, since it is larger than the sum of its proper divisors (1968646588).

2565863812 is a wasteful number, since it uses less digits than its factorization.

2565863812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691 (or 15689 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 2565863812 is about 50654.3562983481. The cubic root of 2565863812 is about 1369.0244376990.

The spelling of 2565863812 in words is "two billion, five hundred sixty-five million, eight hundred sixty-three thousand, eight hundred twelve".