163931790338 has 8 divisors (see below), whose sum is σ = 246140430588. Its totient is φ = 81884980144.

The previous prime is 163931790293. The next prime is 163931790377. The reversal of 163931790338 is 833097139361.

It can be written as a sum of positive squares in 2 ways, for example, as 162588787729 + 1343002609 = 403223^2 + 36647^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 163931790338.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40454981 + ... + 40459032.

Almost surely, 2^163931790338 is an apocalyptic number.

163931790338 is a deficient number, since it is larger than the sum of its proper divisors (82208640250).

163931790338 is a wasteful number, since it uses less digits than its factorization.

163931790338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80915028.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 163931790338 in words is "one hundred sixty-three billion, nine hundred thirty-one million, seven hundred ninety thousand, three hundred thirty-eight".