164789437989 has 16 divisors (see below), whose sum is σ = 239712160320. Its totient is φ = 99864706560.

The previous prime is 164789437949. The next prime is 164789437993. The reversal of 164789437989 is 989734987461.

164789437989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164789437989 - 2⁸ = 164789437733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164789437989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164789437949) 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 in 15 ways as a sum of consecutive naturals, for example, 259477 + ... + 630005.

It is an arithmetic number, because the mean of its divisors is an integer number (14982010020).

Almost surely, 2^164789437989 is an apocalyptic number.

It is an amenable number.

164789437989 is a deficient number, since it is larger than the sum of its proper divisors (74922722331).

164789437989 is a wasteful number, since it uses less digits than its factorization.

164789437989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384020.

The product of its digits is 658409472, while the sum is 75.

The spelling of 164789437989 in words is "one hundred sixty-four billion, seven hundred eighty-nine million, four hundred thirty-seven thousand, nine hundred eighty-nine".