168332805506 has 8 divisors (see below), whose sum is σ = 252500949324. Its totient is φ = 84165822400.

The previous prime is 168332805419. The next prime is 168332805533. The reversal of 168332805506 is 605508233861.

It can be written as a sum of positive squares in 2 ways, for example, as 137652130225 + 30680675281 = 371015^2 + 175159^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420206 + ... + 716406.

Almost surely, 2^168332805506 is an apocalyptic number.

168332805506 is a deficient number, since it is larger than the sum of its proper divisors (84168143818).

168332805506 is a wasteful number, since it uses less digits than its factorization.

168332805506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580356.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 168332805506 in words is "one hundred sixty-eight billion, three hundred thirty-two million, eight hundred five thousand, five hundred six".