163663938916 has 9 divisors (see below), whose sum is σ = 286413309049. Its totient is φ = 81831564904.

The previous prime is 163663938901. The next prime is 163663938923. The reversal of 163663938916 is 619839366361.

The square root of 163663938916 is 404554.

It is a perfect power (a square), and thus also a powerful number.

163663938916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 161483422500 + 2180516416 = 401850^2 + 46696^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 707970 + ... + 910246.

Almost surely, 2^163663938916 is an apocalyptic number.

163663938916 is the 404554-th square number.

It is an amenable number.

163663938916 is a deficient number, since it is larger than the sum of its proper divisors (122749370133).

163663938916 is an frugal number, since it uses more digits than its factorization.

163663938916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404558 (or 202279 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 61.

The spelling of 163663938916 in words is "one hundred sixty-three billion, six hundred sixty-three million, nine hundred thirty-eight thousand, nine hundred sixteen".