163939988689 has 8 divisors (see below), whose sum is σ = 165533738400. Its totient is φ = 162347379936.

The previous prime is 163939988659. The next prime is 163939988717. The reversal of 163939988689 is 986889939361.

163939988689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163939988689 - 2⁵ = 163939988657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163939988659) 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 7 ways as a sum of consecutive naturals, for example, 4957 + ... + 572629.

It is an arithmetic number, because the mean of its divisors is an integer number (20691717300).

Almost surely, 2^163939988689 is an apocalyptic number.

It is an amenable number.

163939988689 is a deficient number, since it is larger than the sum of its proper divisors (1593749711).

163939988689 is a wasteful number, since it uses less digits than its factorization.

163939988689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570479.

The product of its digits is 1088391168, while the sum is 79.

The spelling of 163939988689 in words is "one hundred sixty-three billion, nine hundred thirty-nine million, nine hundred eighty-eight thousand, six hundred eighty-nine".