25655865 has 16 divisors (see below), whose sum is σ = 42465600. Its totient is φ = 13211072.

The previous prime is 25655849. The next prime is 25655887. The reversal of 25655865 is 56855652.

It is a cyclic number.

It is not a de Polignac number, because 25655865 - 2⁴ = 25655849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29055 + ... + 29924.

It is an arithmetic number, because the mean of its divisors is an integer number (2654100).

Almost surely, 2^25655865 is an apocalyptic number.

It is an amenable number.

25655865 is a deficient number, since it is larger than the sum of its proper divisors (16809735).

25655865 is a wasteful number, since it uses less digits than its factorization.

25655865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59016.

The product of its digits is 360000, while the sum is 42.

The square root of 25655865 is about 5065.1618927730. The cubic root of 25655865 is about 294.9367479059.

The spelling of 25655865 in words is "twenty-five million, six hundred fifty-five thousand, eight hundred sixty-five".