2565244465 has 16 divisors (see below), whose sum is σ = 3519145728. Its totient is φ = 1758476736.

The previous prime is 2565244433. The next prime is 2565244483. The reversal of 2565244465 is 5644425652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2565244465 - 2⁵ = 2565244433 is a prime.

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, 125719 + ... + 144691.

It is an arithmetic number, because the mean of its divisors is an integer number (219946608).

Almost surely, 2^2565244465 is an apocalyptic number.

It is an amenable number.

2565244465 is a deficient number, since it is larger than the sum of its proper divisors (953901263).

2565244465 is a wasteful number, since it uses less digits than its factorization.

2565244465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22848.

The product of its digits is 1152000, while the sum is 43.

The square root of 2565244465 is about 50648.2424670393. The cubic root of 2565244465 is about 1368.9142773435.

The spelling of 2565244465 in words is "two billion, five hundred sixty-five million, two hundred forty-four thousand, four hundred sixty-five".