25609212113 has 2 divisors, whose sum is σ = 25609212114. Its totient is φ = 25609212112.

The previous prime is 25609212077. The next prime is 25609212163. The reversal of 25609212113 is 31121290652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16981217344 + 8627994769 = 130312^2 + 92887^2 .

It is a cyclic number.

It is not a de Polignac number, because 25609212113 - 2⁶ = 25609212049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25609212113.

It is not a weakly prime, because it can be changed into another prime (25609212163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12804606056 + 12804606057.

It is an arithmetic number, because the mean of its divisors is an integer number (12804606057).

Almost surely, 2^25609212113 is an apocalyptic number.

It is an amenable number.

25609212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

25609212113 is an equidigital number, since it uses as much as digits as its factorization.

25609212113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 25609212113 in words is "twenty-five billion, six hundred nine million, two hundred twelve thousand, one hundred thirteen".