264785265 has 24 divisors (see below), whose sum is σ = 463700328. Its totient is φ = 139760640.

The previous prime is 264785249. The next prime is 264785299. The reversal of 264785265 is 562587462.

It can be written as a sum of positive squares in 4 ways, for example, as 3122289 + 261662976 = 1767^2 + 16176^2 .

It is not a de Polignac number, because 264785265 - 2⁴ = 264785249 is a prime.

It is a super-2 number, since 2×264785265² = 140222473122240450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 264785265.

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, 25966 + ... + 34695.

It is an arithmetic number, because the mean of its divisors is an integer number (19320847).

Almost surely, 2^264785265 is an apocalyptic number.

It is an amenable number.

264785265 is a deficient number, since it is larger than the sum of its proper divisors (198915063).

264785265 is a wasteful number, since it uses less digits than its factorization.

264785265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60769 (or 60766 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 264785265 is about 16272.2237263381. The cubic root of 264785265 is about 642.1422880241.

The spelling of 264785265 in words is "two hundred sixty-four million, seven hundred eighty-five thousand, two hundred sixty-five".