2565635265 has 24 divisors (see below), whose sum is σ = 4681160640. Its totient is φ = 1296320544.

The previous prime is 2565635231. The next prime is 2565635269. The reversal of 2565635265 is 5625365652.

2565635265 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 635 + 2 + 6 + 5 = 666.

2565635265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2565635265 - 2¹² = 2565631169 is a prime.

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 2565635265.

It is not an unprimeable number, because it can be changed into a prime (2565635269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1499517 + ... + 1501226.

It is an arithmetic number, because the mean of its divisors is an integer number (195048360).

Almost surely, 2^2565635265 is an apocalyptic number.

It is an amenable number.

2565635265 is a deficient number, since it is larger than the sum of its proper divisors (2115525375).

2565635265 is a wasteful number, since it uses less digits than its factorization.

2565635265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000773 (or 3000770 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The square root of 2565635265 is about 50652.1003019618. The cubic root of 2565635265 is about 1368.9837891765.

The spelling of 2565635265 in words is "two billion, five hundred sixty-five million, six hundred thirty-five thousand, two hundred sixty-five".