25689164 has 12 divisors (see below), whose sum is σ = 45498264. Its totient is φ = 12689664.

The previous prime is 25689163. The next prime is 25689187. The reversal of 25689164 is 46198652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25689161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38357 + ... + 39020.

It is an arithmetic number, because the mean of its divisors is an integer number (3791522).

Almost surely, 2^25689164 is an apocalyptic number.

It is an amenable number.

25689164 is a deficient number, since it is larger than the sum of its proper divisors (19809100).

25689164 is a wasteful number, since it uses less digits than its factorization.

25689164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77464 (or 77462 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 25689164 is about 5068.4478886539. The cubic root of 25689164 is about 295.0642931782.

The spelling of 25689164 in words is "twenty-five million, six hundred eighty-nine thousand, one hundred sixty-four".