168318003321 has 40 divisors (see below), whose sum is σ = 272596955400. Its totient is φ = 102885043968.

The previous prime is 168318003283. The next prime is 168318003331. The reversal of 168318003321 is 123300813861.

168318003321 is a `hidden beast` number, since 1 + 6 + 8 + 318 + 0 + 0 + 332 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14481474921 + 153836528400 = 120339^2 + 392220^2 .

It is not a de Polignac number, because 168318003321 - 2¹¹ = 168318001273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168318003331) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 379500 + ... + 693293.

It is an arithmetic number, because the mean of its divisors is an integer number (6814923885).

Almost surely, 2^168318003321 is an apocalyptic number.

It is an amenable number.

168318003321 is a deficient number, since it is larger than the sum of its proper divisors (104278952079).

168318003321 is a wasteful number, since it uses less digits than its factorization.

168318003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072967 (or 1072958 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 168318003321 in words is "one hundred sixty-eight billion, three hundred eighteen million, three thousand, three hundred twenty-one".