25819136113 has 2 divisors, whose sum is σ = 25819136114. Its totient is φ = 25819136112.

The previous prime is 25819136099. The next prime is 25819136137. The reversal of 25819136113 is 31163191852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25748374369 + 70761744 = 160463^2 + 8412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25819136113 is a prime.

It is not a weakly prime, because it can be changed into another prime (25819736113) 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 as a sum of consecutive naturals, namely, 12909568056 + 12909568057.

It is an arithmetic number, because the mean of its divisors is an integer number (12909568057).

Almost surely, 2^25819136113 is an apocalyptic number.

It is an amenable number.

25819136113 is a deficient number, since it is larger than the sum of its proper divisors (1).

25819136113 is an equidigital number, since it uses as much as digits as its factorization.

25819136113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The spelling of 25819136113 in words is "twenty-five billion, eight hundred nineteen million, one hundred thirty-six thousand, one hundred thirteen".