25563868 has 12 divisors (see below), whose sum is σ = 48803832. Its totient is φ = 11619920.

The previous prime is 25563841. The next prime is 25563893. The reversal of 25563868 is 86836552.

It is a happy number.

It is a super-2 number, since 2×25563868² = 1307022694242848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290455 + ... + 290542.

It is an arithmetic number, because the mean of its divisors is an integer number (4066986).

Almost surely, 2^25563868 is an apocalyptic number.

It is an amenable number.

25563868 is a deficient number, since it is larger than the sum of its proper divisors (23239964).

25563868 is a wasteful number, since it uses less digits than its factorization.

25563868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581012 (or 581010 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 25563868 is about 5056.0723887223. The cubic root of 25563868 is about 294.5837968704.

The spelling of 25563868 in words is "twenty-five million, five hundred sixty-three thousand, eight hundred sixty-eight".