25602304513 has 2 divisors, whose sum is σ = 25602304514. Its totient is φ = 25602304512.

The previous prime is 25602304493. The next prime is 25602304517. The reversal of 25602304513 is 31540320652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16756525809 + 8845778704 = 129447^2 + 94052^2 .

It is a cyclic number.

It is not a de Polignac number, because 25602304513 - 2³³ = 17012369921 is a prime.

It is not a weakly prime, because it can be changed into another prime (25602304517) 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, 12801152256 + 12801152257.

It is an arithmetic number, because the mean of its divisors is an integer number (12801152257).

Almost surely, 2^25602304513 is an apocalyptic number.

It is an amenable number.

25602304513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25602304513 is an equidigital number, since it uses as much as digits as its factorization.

25602304513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 25602304513 in words is "twenty-five billion, six hundred two million, three hundred four thousand, five hundred thirteen".