25318138338 has 12 divisors (see below), whose sum is σ = 54855966438. Its totient is φ = 8439379440.

The previous prime is 25318138291. The next prime is 25318138367. The reversal of 25318138338 is 83383181352.

25318138338 is a `hidden beast` number, since 2 + 531 + 8 + 1 + 3 + 83 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12736702449 + 12581435889 = 112857^2 + 112167^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25318138293 and 25318138302.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 703281603 + ... + 703281638.

Almost surely, 2^25318138338 is an apocalyptic number.

25318138338 is an abundant number, since it is smaller than the sum of its proper divisors (29537828100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25318138338 is a wasteful number, since it uses less digits than its factorization.

25318138338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406563249 (or 1406563246 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 25318138338 in words is "twenty-five billion, three hundred eighteen million, one hundred thirty-eight thousand, three hundred thirty-eight".