2565312556 has 12 divisors (see below), whose sum is σ = 4495477168. Its totient is φ = 1280890512.

The previous prime is 2565312523. The next prime is 2565312557. The reversal of 2565312556 is 6552135652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2565312557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438171 + ... + 443986.

Almost surely, 2^2565312556 is an apocalyptic number.

It is an amenable number.

2565312556 is a deficient number, since it is larger than the sum of its proper divisors (1930164612).

2565312556 is a wasteful number, since it uses less digits than its factorization.

2565312556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882888 (or 882886 counting only the distinct ones).

The product of its digits is 270000, while the sum is 40.

The square root of 2565312556 is about 50648.9146576706. The cubic root of 2565312556 is about 1368.9263892388.

The spelling of 2565312556 in words is "two billion, five hundred sixty-five million, three hundred twelve thousand, five hundred fifty-six".