25561672 has 16 divisors (see below), whose sum is σ = 49224060. Its totient is φ = 12435264.

The previous prime is 25561661. The next prime is 25561681. The reversal of 25561672 is 27616552.

It can be written as a sum of positive squares in 2 ways, for example, as 22982436 + 2579236 = 4794^2 + 1606^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42883 + ... + 43474.

Almost surely, 2^25561672 is an apocalyptic number.

It is an amenable number.

25561672 is a deficient number, since it is larger than the sum of its proper divisors (23662388).

25561672 is a wasteful number, since it uses less digits than its factorization.

25561672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86400 (or 86396 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 25561672 is about 5055.8552194461. The cubic root of 25561672 is about 294.5753614679.

The spelling of 25561672 in words is "twenty-five million, five hundred sixty-one thousand, six hundred seventy-two".