25565652872 has 8 divisors (see below), whose sum is σ = 47935599150. Its totient is φ = 12782826432.

The previous prime is 25565652859. The next prime is 25565652913. The reversal of 25565652872 is 27825656552.

It can be written as a sum of positive squares in only one way, i.e., 25387323556 + 178329316 = 159334^2 + 13354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597853297 + ... + 1597853312.

Almost surely, 2^25565652872 is an apocalyptic number.

It is an amenable number.

25565652872 is a deficient number, since it is larger than the sum of its proper divisors (22369946278).

25565652872 is a wasteful number, since it uses less digits than its factorization.

25565652872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195706615 (or 3195706611 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 53.

The spelling of 25565652872 in words is "twenty-five billion, five hundred sixty-five million, six hundred fifty-two thousand, eight hundred seventy-two".