25420363193 has 2 divisors, whose sum is σ = 25420363194. Its totient is φ = 25420363192.

The previous prime is 25420363151. The next prime is 25420363201. The reversal of 25420363193 is 39136302452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13585534249 + 11834828944 = 116557^2 + 108788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25420363193 is a prime.

It is not a weakly prime, because it can be changed into another prime (25420363693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710181596 + 12710181597.

It is an arithmetic number, because the mean of its divisors is an integer number (12710181597).

Almost surely, 2^25420363193 is an apocalyptic number.

It is an amenable number.

25420363193 is a deficient number, since it is larger than the sum of its proper divisors (1).

25420363193 is an equidigital number, since it uses as much as digits as its factorization.

25420363193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 25420363193 in words is "twenty-five billion, four hundred twenty million, three hundred sixty-three thousand, one hundred ninety-three".