25449133898 has 16 divisors (see below), whose sum is σ = 38996052480. Its totient is φ = 12450590736.

The previous prime is 25449133813. The next prime is 25449133907. The reversal of 25449133898 is 89833194452.

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, 350240 + ... + 416612.

It is an arithmetic number, because the mean of its divisors is an integer number (2437253280).

Almost surely, 2^25449133898 is an apocalyptic number.

25449133898 is a deficient number, since it is larger than the sum of its proper divisors (13546918582).

25449133898 is a wasteful number, since it uses less digits than its factorization.

25449133898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70501.

The product of its digits is 7464960, while the sum is 56.

The spelling of 25449133898 in words is "twenty-five billion, four hundred forty-nine million, one hundred thirty-three thousand, eight hundred ninety-eight".