25255891515156 has 48 divisors (see below), whose sum is σ = 59941500292800. Its totient is φ = 8274247950592.

The previous prime is 25255891515149. The next prime is 25255891515191. The reversal of 25255891515156 is 65151519855252.

It is a self number, because there is not a number n which added to its sum of digits gives 25255891515156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186795 + ... + 7109618.

It is an arithmetic number, because the mean of its divisors is an integer number (1248781256100).

Almost surely, 2^{25255891515156} is an apocalyptic number.

It is an amenable number.

25255891515156 is an abundant number, since it is smaller than the sum of its proper divisors (34685608777644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25255891515156 is a wasteful number, since it uses less digits than its factorization.

25255891515156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7301368 (or 7301366 counting only the distinct ones).

The product of its digits is 27000000, while the sum is 60.

The spelling of 25255891515156 in words is "twenty-five trillion, two hundred fifty-five billion, eight hundred ninety-one million, five hundred fifteen thousand, one hundred fifty-six".