2565320402 has 16 divisors (see below), whose sum is σ = 3940529472. Its totient is φ = 1251857040.

The previous prime is 2565320389. The next prime is 2565320419. The reversal of 2565320402 is 2040235652.

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, 106652 + ... + 128472.

It is an arithmetic number, because the mean of its divisors is an integer number (246283092).

Almost surely, 2^2565320402 is an apocalyptic number.

2565320402 is a deficient number, since it is larger than the sum of its proper divisors (1375209070).

2565320402 is a wasteful number, since it uses less digits than its factorization.

2565320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23233.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2565320402 is about 50648.9921123807. The cubic root of 2565320402 is about 1368.9277848563.

The spelling of 2565320402 in words is "two billion, five hundred sixty-five million, three hundred twenty thousand, four hundred two".