168673430605 has 4 divisors (see below), whose sum is σ = 202408116732. Its totient is φ = 134938744480.

The previous prime is 168673430587. The next prime is 168673430609. The reversal of 168673430605 is 506034376861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70069266436 + 98604164169 = 264706^2 + 314013^2 .

It is not a de Polignac number, because 168673430605 - 2²⁵ = 168639876173 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168673430609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16867343056 + ... + 16867343065.

It is an arithmetic number, because the mean of its divisors is an integer number (50602029183).

Almost surely, 2^168673430605 is an apocalyptic number.

It is an amenable number.

168673430605 is a deficient number, since it is larger than the sum of its proper divisors (33734686127).

168673430605 is an equidigital number, since it uses as much as digits as its factorization.

168673430605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33734686126.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 168673430605 in words is "one hundred sixty-eight billion, six hundred seventy-three million, four hundred thirty thousand, six hundred five".