25564556 has 12 divisors (see below), whose sum is σ = 44997792. Its totient is φ = 12708048.

The previous prime is 25564541. The next prime is 25564559. The reversal of 25564556 is 65546552.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25564559) 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, 17780 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (3749816).

Almost surely, 2^25564556 is an apocalyptic number.

It is an amenable number.

25564556 is a deficient number, since it is larger than the sum of its proper divisors (19433236).

25564556 is a wasteful number, since it uses less digits than its factorization.

25564556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37120 (or 37118 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

The square root of 25564556 is about 5056.1404252651. The cubic root of 25564556 is about 294.5864395564.

The spelling of 25564556 in words is "twenty-five million, five hundred sixty-four thousand, five hundred fifty-six".