25513525139 has 2 divisors, whose sum is σ = 25513525140. Its totient is φ = 25513525138.

The previous prime is 25513525129. The next prime is 25513525157. The reversal of 25513525139 is 93152531552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25513525139 - 2²⁴ = 25496747923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25513525096 and 25513525105.

It is not a weakly prime, because it can be changed into another prime (25513525129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756762569 + 12756762570.

It is an arithmetic number, because the mean of its divisors is an integer number (12756762570).

Almost surely, 2^25513525139 is an apocalyptic number.

25513525139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513525139 is an equidigital number, since it uses as much as digits as its factorization.

25513525139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 41.

The spelling of 25513525139 in words is "twenty-five billion, five hundred thirteen million, five hundred twenty-five thousand, one hundred thirty-nine".