25891259028 has 24 divisors (see below), whose sum is σ = 60533057088. Its totient is φ = 8613259776.

The previous prime is 25891259027. The next prime is 25891259033. The reversal of 25891259028 is 82095219852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25891259027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2138701 + ... + 2150772.

It is an arithmetic number, because the mean of its divisors is an integer number (2522210712).

Almost surely, 2^25891259028 is an apocalyptic number.

It is an amenable number.

25891259028 is an abundant number, since it is smaller than the sum of its proper divisors (34641798060).

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

25891259028 is a wasteful number, since it uses less digits than its factorization.

25891259028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289983 (or 4289981 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 25891259028 in words is "twenty-five billion, eight hundred ninety-one million, two hundred fifty-nine thousand, twenty-eight".