25368813913 has 2 divisors, whose sum is σ = 25368813914. Its totient is φ = 25368813912.

The previous prime is 25368813853. The next prime is 25368813929. The reversal of 25368813913 is 31931886352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23132280649 + 2236533264 = 152093^2 + 47292^2 .

It is a cyclic number.

It is not a de Polignac number, because 25368813913 - 2²⁹ = 24831943001 is a prime.

It is not a weakly prime, because it can be changed into another prime (25368813713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12684406956 + 12684406957.

It is an arithmetic number, because the mean of its divisors is an integer number (12684406957).

Almost surely, 2^25368813913 is an apocalyptic number.

It is an amenable number.

25368813913 is a deficient number, since it is larger than the sum of its proper divisors (1).

25368813913 is an equidigital number, since it uses as much as digits as its factorization.

25368813913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The spelling of 25368813913 in words is "twenty-five billion, three hundred sixty-eight million, eight hundred thirteen thousand, nine hundred thirteen".