25459138918 has 32 divisors (see below), whose sum is σ = 39929760000. Its totient is φ = 12158894496.

The previous prime is 25459138867. The next prime is 25459138927. The reversal of 25459138918 is 81983195452.

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, 8953605 + ... + 8956447.

It is an arithmetic number, because the mean of its divisors is an integer number (1247805000).

Almost surely, 2^25459138918 is an apocalyptic number.

25459138918 is a deficient number, since it is larger than the sum of its proper divisors (14470621082).

25459138918 is a wasteful number, since it uses less digits than its factorization.

25459138918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476.

The product of its digits is 3110400, while the sum is 55.

The spelling of 25459138918 in words is "twenty-five billion, four hundred fifty-nine million, one hundred thirty-eight thousand, nine hundred eighteen".