25994938436 has 24 divisors (see below), whose sum is σ = 46564107744. Its totient is φ = 12691103040.

The previous prime is 25994938397. The next prime is 25994938447. The reversal of 25994938436 is 63483949952.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548816 + ... + 594296.

It is an arithmetic number, because the mean of its divisors is an integer number (1940171156).

Almost surely, 2^25994938436 is an apocalyptic number.

It is an amenable number.

25994938436 is a deficient number, since it is larger than the sum of its proper divisors (20569169308).

25994938436 is a wasteful number, since it uses less digits than its factorization.

25994938436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48851 (or 48849 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 62.

The spelling of 25994938436 in words is "twenty-five billion, nine hundred ninety-four million, nine hundred thirty-eight thousand, four hundred thirty-six".