25501922191 has 2 divisors, whose sum is σ = 25501922192. Its totient is φ = 25501922190.

The previous prime is 25501922167. The next prime is 25501922197. The reversal of 25501922191 is 19122910552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25501922191 - 2²⁵ = 25468367759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25501922191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25501922197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750961095 + 12750961096.

It is an arithmetic number, because the mean of its divisors is an integer number (12750961096).

Almost surely, 2^25501922191 is an apocalyptic number.

25501922191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25501922191 is an equidigital number, since it uses as much as digits as its factorization.

25501922191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 25501922191 in words is "twenty-five billion, five hundred one million, nine hundred twenty-two thousand, one hundred ninety-one".