265500565 has 32 divisors (see below), whose sum is σ = 356526720. Its totient is φ = 188179200.

The previous prime is 265500553. The next prime is 265500581. The reversal of 265500565 is 565005562.

It is a happy number.

It is not a de Polignac number, because 265500565 - 2⁷ = 265500437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265500565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401335 + ... + 401995.

It is an arithmetic number, because the mean of its divisors is an integer number (11141460).

Almost surely, 2^265500565 is an apocalyptic number.

It is an amenable number.

265500565 is a deficient number, since it is larger than the sum of its proper divisors (91026155).

265500565 is a wasteful number, since it uses less digits than its factorization.

265500565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 265500565 is about 16294.1880742797. The cubic root of 265500565 is about 642.7200031860.

The spelling of 265500565 in words is "two hundred sixty-five million, five hundred thousand, five hundred sixty-five".