164491932019 has 2 divisors, whose sum is σ = 164491932020. Its totient is φ = 164491932018.

The previous prime is 164491931971. The next prime is 164491932037. The reversal of 164491932019 is 910239194461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164491932019 - 2³⁵ = 130132193651 is a prime.

It is a super-2 number, since 2×164491932019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164491932049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82245966009 + 82245966010.

It is an arithmetic number, because the mean of its divisors is an integer number (82245966010).

Almost surely, 2^164491932019 is an apocalyptic number.

164491932019 is a deficient number, since it is larger than the sum of its proper divisors (1).

164491932019 is an equidigital number, since it uses as much as digits as its factorization.

164491932019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 164491932019 in words is "one hundred sixty-four billion, four hundred ninety-one million, nine hundred thirty-two thousand, nineteen".