2565085825 has 6 divisors (see below), whose sum is σ = 3180706454. Its totient is φ = 2052068640.

The previous prime is 2565085781. The next prime is 2565085841. The reversal of 2565085825 is 5285805652.

It can be written as a sum of positive squares in 3 ways, for example, as 550512369 + 2014573456 = 23463^2 + 44884^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2565085825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51301692 + ... + 51301741.

Almost surely, 2^2565085825 is an apocalyptic number.

2565085825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565085825 is a deficient number, since it is larger than the sum of its proper divisors (615620629).

2565085825 is a wasteful number, since it uses less digits than its factorization.

2565085825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102603443 (or 102603438 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 46.

The square root of 2565085825 is about 50646.6763470220. The cubic root of 2565085825 is about 1368.8860579358.

The spelling of 2565085825 in words is "two billion, five hundred sixty-five million, eighty-five thousand, eight hundred twenty-five".