25305002505278 has 12 divisors (see below), whose sum is σ = 40321638940992. Its totient is φ = 11908236472800.

The previous prime is 25305002505269. The next prime is 25305002505353. The reversal of 25305002505278 is 87250520050352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21890139998 + ... + 21890141153.

It is an arithmetic number, because the mean of its divisors is an integer number (3360136578416).

Almost surely, 2^{25305002505278} is an apocalyptic number.

25305002505278 is a deficient number, since it is larger than the sum of its proper divisors (15016636435714).

25305002505278 is a wasteful number, since it uses less digits than its factorization.

25305002505278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43780281187 (or 43780281170 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 25305002505278 in words is "twenty-five trillion, three hundred five billion, two million, five hundred five thousand, two hundred seventy-eight".