2564530265 has 24 divisors (see below), whose sum is σ = 3423458304. Its totient is φ = 1842605600.

The previous prime is 2564530247. The next prime is 2564530271. The reversal of 2564530265 is 5620354652.

It is not a de Polignac number, because 2564530265 - 2²⁸ = 2296094809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24680 + ... + 75750.

It is an arithmetic number, because the mean of its divisors is an integer number (142644096).

Almost surely, 2^2564530265 is an apocalyptic number.

It is an amenable number.

2564530265 is a deficient number, since it is larger than the sum of its proper divisors (858928039).

2564530265 is a wasteful number, since it uses less digits than its factorization.

2564530265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51181 (or 51170 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 38.

The square root of 2564530265 is about 50641.1913860644. The cubic root of 2564530265 is about 1368.7872239135.

The spelling of 2564530265 in words is "two billion, five hundred sixty-four million, five hundred thirty thousand, two hundred sixty-five".