25561156 has 24 divisors (see below), whose sum is σ = 47628000. Its totient is φ = 11968704.

The previous prime is 25561147. The next prime is 25561189. The reversal of 25561156 is 65116552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4875 + ... + 8653.

It is an arithmetic number, because the mean of its divisors is an integer number (1984500).

Almost surely, 2^25561156 is an apocalyptic number.

It is an amenable number.

25561156 is a deficient number, since it is larger than the sum of its proper divisors (22066844).

25561156 is a wasteful number, since it uses less digits than its factorization.

25561156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891 (or 3889 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 25561156 is about 5055.8041892463. The cubic root of 25561156 is about 294.5733793088.

The spelling of 25561156 in words is "twenty-five million, five hundred sixty-one thousand, one hundred fifty-six".