25958634989 has 12 divisors (see below), whose sum is σ = 30427296768. Its totient is φ = 22080403800.

The previous prime is 25958634881. The next prime is 25958634997. The reversal of 25958634989 is 98943685952.

It is not a de Polignac number, because 25958634989 - 2²⁸ = 25690199533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25958634389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2015597 + ... + 2028434.

It is an arithmetic number, because the mean of its divisors is an integer number (2535608064).

Almost surely, 2^25958634989 is an apocalyptic number.

It is an amenable number.

25958634989 is a deficient number, since it is larger than the sum of its proper divisors (4468661779).

25958634989 is a wasteful number, since it uses less digits than its factorization.

25958634989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044176 (or 4044169 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 68.

The spelling of 25958634989 in words is "twenty-five billion, nine hundred fifty-eight million, six hundred thirty-four thousand, nine hundred eighty-nine".