25409716193 has 2 divisors, whose sum is σ = 25409716194. Its totient is φ = 25409716192.

The previous prime is 25409716159. The next prime is 25409716243. The reversal of 25409716193 is 39161790452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17279628304 + 8130087889 = 131452^2 + 90167^2 .

It is a cyclic number.

It is not a de Polignac number, because 25409716193 - 2⁸ = 25409715937 is a prime.

It is not a weakly prime, because it can be changed into another prime (25409716793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12704858096 + 12704858097.

It is an arithmetic number, because the mean of its divisors is an integer number (12704858097).

Almost surely, 2^25409716193 is an apocalyptic number.

It is an amenable number.

25409716193 is a deficient number, since it is larger than the sum of its proper divisors (1).

25409716193 is an equidigital number, since it uses as much as digits as its factorization.

25409716193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 25409716193 in words is "twenty-five billion, four hundred nine million, seven hundred sixteen thousand, one hundred ninety-three".