25561568 has 12 divisors (see below), whose sum is σ = 50324400. Its totient is φ = 12780768.

The previous prime is 25561559. The next prime is 25561603. The reversal of 25561568 is 86516552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399368 + ... + 399431.

It is an arithmetic number, because the mean of its divisors is an integer number (4193700).

Almost surely, 2^25561568 is an apocalyptic number.

It is an amenable number.

25561568 is a deficient number, since it is larger than the sum of its proper divisors (24762832).

25561568 is an equidigital number, since it uses as much as digits as its factorization.

25561568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798809 (or 798801 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 25561568 is about 5055.8449343310. The cubic root of 25561568 is about 294.5749619651.

The spelling of 25561568 in words is "twenty-five million, five hundred sixty-one thousand, five hundred sixty-eight".