26164922191 has 2 divisors, whose sum is σ = 26164922192. Its totient is φ = 26164922190.

The previous prime is 26164922171. The next prime is 26164922233. The reversal of 26164922191 is 19122946162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26164922191 - 2⁵ = 26164922159 is a prime.

It is a super-2 number, since 2×26164922191² (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 (26164922131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13082461095 + 13082461096.

It is an arithmetic number, because the mean of its divisors is an integer number (13082461096).

Almost surely, 2^26164922191 is an apocalyptic number.

26164922191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26164922191 is an equidigital number, since it uses as much as digits as its factorization.

26164922191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The spelling of 26164922191 in words is "twenty-six billion, one hundred sixty-four million, nine hundred twenty-two thousand, one hundred ninety-one".