25640672850244 has 9 divisors (see below), whose sum is σ = 44871195210751. Its totient is φ = 12820331361460.

The previous prime is 25640672850211. The next prime is 25640672850263. The reversal of 25640672850244 is 44205827604652.

The square root of 25640672850244 is 5063662.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8861409 + ... + 11393239.

Almost surely, 2^{25640672850244} is an apocalyptic number.

25640672850244 is the 5063662-nd square number.

It is an amenable number.

25640672850244 is a deficient number, since it is larger than the sum of its proper divisors (19230522360507).

25640672850244 is an frugal number, since it uses more digits than its factorization.

25640672850244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063666 (or 2531833 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 55.

The spelling of 25640672850244 in words is "twenty-five trillion, six hundred forty billion, six hundred seventy-two million, eight hundred fifty thousand, two hundred forty-four".