25506564 has 24 divisors (see below), whose sum is σ = 60234720. Its totient is φ = 8399424.

The previous prime is 25506557. The next prime is 25506577. The reversal of 25506564 is 46560552.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11809 + ... + 13800.

It is an arithmetic number, because the mean of its divisors is an integer number (2509780).

Almost surely, 2^25506564 is an apocalyptic number.

It is an amenable number.

25506564 is an abundant number, since it is smaller than the sum of its proper divisors (34728156).

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

25506564 is a wasteful number, since it uses less digits than its factorization.

25506564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25699 (or 25697 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 25506564 is about 5050.4023602085. The cubic root of 25506564 is about 294.3635190549.

The spelling of 25506564 in words is "twenty-five million, five hundred six thousand, five hundred sixty-four".