164706317591 has 2 divisors, whose sum is σ = 164706317592. Its totient is φ = 164706317590.

The previous prime is 164706317561. The next prime is 164706317693. The reversal of 164706317591 is 195713607461.

164706317591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164706317591 - 2¹⁸ = 164706055447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164706317561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82353158795 + 82353158796.

It is an arithmetic number, because the mean of its divisors is an integer number (82353158796).

Almost surely, 2^164706317591 is an apocalyptic number.

164706317591 is a deficient number, since it is larger than the sum of its proper divisors (1).

164706317591 is an equidigital number, since it uses as much as digits as its factorization.

164706317591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 164706317591 in words is "one hundred sixty-four billion, seven hundred six million, three hundred seventeen thousand, five hundred ninety-one".