2525906565 has 128 divisors (see below), whose sum is σ = 5677163520. Its totient is φ = 1036882944.

The previous prime is 2525906533. The next prime is 2525906573. The reversal of 2525906565 is 5656095252.

2525906565 is a `hidden beast` number, since 2 + 5 + 2 + 590 + 6 + 56 + 5 = 666.

It is not a de Polignac number, because 2525906565 - 2⁵ = 2525906533 is a prime.

It is a super-2 number, since 2×2525906565² = 12760407950220198450, 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 2525906565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 451767 + ... + 457323.

It is an arithmetic number, because the mean of its divisors is an integer number (44352840).

Almost surely, 2^2525906565 is an apocalyptic number.

It is an amenable number.

2525906565 is an abundant number, since it is smaller than the sum of its proper divisors (3151256955).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2525906565 is a wasteful number, since it uses less digits than its factorization.

2525906565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 5622 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 2525906565 is about 50258.3979549687. The cubic root of 2525906565 is about 1361.8807896983.

The spelling of 2525906565 in words is "two billion, five hundred twenty-five million, nine hundred six thousand, five hundred sixty-five".