25561868 has 24 divisors (see below), whose sum is σ = 46040400. Its totient is φ = 12412928.

The previous prime is 25561853. The next prime is 25561883. The reversal of 25561868 is 86816552.

It is an interprime number because it is at equal distance from previous prime (25561853) and next prime (25561883).

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, 20396 + ... + 21612.

It is an arithmetic number, because the mean of its divisors is an integer number (1918350).

Almost surely, 2^25561868 is an apocalyptic number.

It is an amenable number.

25561868 is a deficient number, since it is larger than the sum of its proper divisors (20478532).

25561868 is a wasteful number, since it uses less digits than its factorization.

25561868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369 (or 1367 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The square root of 25561868 is about 5055.8746028754. The cubic root of 25561868 is about 294.5761143741.

The spelling of 25561868 in words is "twenty-five million, five hundred sixty-one thousand, eight hundred sixty-eight".