25718405191 has 2 divisors, whose sum is σ = 25718405192. Its totient is φ = 25718405190.

The previous prime is 25718405161. The next prime is 25718405281. The reversal of 25718405191 is 19150481752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25718405191 - 2⁵ = 25718405159 is a prime.

It is a super-2 number, since 2×25718405191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25718405161) 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, 12859202595 + 12859202596.

It is an arithmetic number, because the mean of its divisors is an integer number (12859202596).

Almost surely, 2^25718405191 is an apocalyptic number.

25718405191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25718405191 is an equidigital number, since it uses as much as digits as its factorization.

25718405191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 25718405191 in words is "twenty-five billion, seven hundred eighteen million, four hundred five thousand, one hundred ninety-one".