164442560591 has 2 divisors, whose sum is σ = 164442560592. Its totient is φ = 164442560590.

The previous prime is 164442560563. The next prime is 164442560687. The reversal of 164442560591 is 195065244461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164442560591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164442560791) 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, 82221280295 + 82221280296.

It is an arithmetic number, because the mean of its divisors is an integer number (82221280296).

Almost surely, 2^164442560591 is an apocalyptic number.

164442560591 is a deficient number, since it is larger than the sum of its proper divisors (1).

164442560591 is an equidigital number, since it uses as much as digits as its factorization.

164442560591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 164442560591 in words is "one hundred sixty-four billion, four hundred forty-two million, five hundred sixty thousand, five hundred ninety-one".