25792539138 has 12 divisors (see below), whose sum is σ = 55883834838. Its totient is φ = 8597513040.

The previous prime is 25792539137. The next prime is 25792539191. The reversal of 25792539138 is 83193529752.

25792539138 is a `hidden beast` number, since 2 + 5 + 7 + 92 + 539 + 13 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23107952169 + 2684586969 = 152013^2 + 51813^2 .

It is not an unprimeable number, because it can be changed into a prime (25792539131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 716459403 + ... + 716459438.

Almost surely, 2^25792539138 is an apocalyptic number.

25792539138 is an abundant number, since it is smaller than the sum of its proper divisors (30091295700).

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

25792539138 is a wasteful number, since it uses less digits than its factorization.

25792539138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432918849 (or 1432918846 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 25792539138 in words is "twenty-five billion, seven hundred ninety-two million, five hundred thirty-nine thousand, one hundred thirty-eight".