25791761138 has 16 divisors (see below), whose sum is σ = 45451215936. Its totient is φ = 10821717840.

The previous prime is 25791761027. The next prime is 25791761161. The reversal of 25791761138 is 83116719752.

It is a happy number.

25791761138 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 45090206 + ... + 45090777.

It is an arithmetic number, because the mean of its divisors is an integer number (2840700996).

Almost surely, 2^25791761138 is an apocalyptic number.

25791761138 is a deficient number, since it is larger than the sum of its proper divisors (19659454798).

25791761138 is a wasteful number, since it uses less digits than its factorization.

25791761138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90181009.

The product of its digits is 635040, while the sum is 50.

The spelling of 25791761138 in words is "twenty-five billion, seven hundred ninety-one million, seven hundred sixty-one thousand, one hundred thirty-eight".