26564191 has 2 divisors, whose sum is σ = 26564192. Its totient is φ = 26564190.

The previous prime is 26564177. The next prime is 26564207. The reversal of 26564191 is 19146562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26564191 - 2⁵ = 26564159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26564171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13282095 + 13282096.

It is an arithmetic number, because the mean of its divisors is an integer number (13282096).

Almost surely, 2^26564191 is an apocalyptic number.

26564191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26564191 is an equidigital number, since it uses as much as digits as its factorization.

26564191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 26564191 is about 5154.0460805080. The cubic root of 26564191 is about 298.3771293928.

The spelling of 26564191 in words is "twenty-six million, five hundred sixty-four thousand, one hundred ninety-one".