163388799738 has 12 divisors (see below), whose sum is σ = 354009066138. Its totient is φ = 54462933240.

The previous prime is 163388799719. The next prime is 163388799793. The reversal of 163388799738 is 837997883361.

163388799738 is a `hidden beast` number, since 1 + 63 + 388 + 79 + 97 + 38 = 666.

163388799738 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., 161485833609 + 1902966129 = 401853^2 + 43623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4538577753 + ... + 4538577788.

Almost surely, 2^163388799738 is an apocalyptic number.

163388799738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163388799738 is an abundant number, since it is smaller than the sum of its proper divisors (190620266400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163388799738 is a wasteful number, since it uses less digits than its factorization.

163388799738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077155549 (or 9077155546 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The spelling of 163388799738 in words is "one hundred sixty-three billion, three hundred eighty-eight million, seven hundred ninety-nine thousand, seven hundred thirty-eight".