164565000991 has 2 divisors, whose sum is σ = 164565000992. Its totient is φ = 164565000990.

The previous prime is 164565000923. The next prime is 164565001049. The reversal of 164565000991 is 199000565461.

It is a happy number.

164565000991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164565000991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164565000491) 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, 82282500495 + 82282500496.

It is an arithmetic number, because the mean of its divisors is an integer number (82282500496).

Almost surely, 2^164565000991 is an apocalyptic number.

164565000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

164565000991 is an equidigital number, since it uses as much as digits as its factorization.

164565000991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 164565000991 in words is "one hundred sixty-four billion, five hundred sixty-five million, nine hundred ninety-one", and thus it is an aban number.