164491931399 has 2 divisors, whose sum is σ = 164491931400. Its totient is φ = 164491931398.

The previous prime is 164491931377. The next prime is 164491931423. The reversal of 164491931399 is 993139194461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164491931399 - 2⁸ = 164491931143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164491631399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82245965699 + 82245965700.

It is an arithmetic number, because the mean of its divisors is an integer number (82245965700).

Almost surely, 2^164491931399 is an apocalyptic number.

164491931399 is a deficient number, since it is larger than the sum of its proper divisors (1).

164491931399 is an equidigital number, since it uses as much as digits as its factorization.

164491931399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 59.

The spelling of 164491931399 in words is "one hundred sixty-four billion, four hundred ninety-one million, nine hundred thirty-one thousand, three hundred ninety-nine".