168362986936321 has 4 divisors (see below), whose sum is σ = 168751816005892. Its totient is φ = 167974157866752.

The previous prime is 168362986936247. The next prime is 168362986936337. The reversal of 168362986936321 is 123639689263861.

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 41735476090000 + 126627510846321 = 6460300^2 + 11252889^2 .

It is a cyclic number.

It is not a de Polignac number, because 168362986936321 - 2²¹ = 168362984839169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168362986936721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194414534136 + ... + 194414535001.

It is an arithmetic number, because the mean of its divisors is an integer number (42187954001473).

Almost surely, 2^{168362986936321} is an apocalyptic number.

It is an amenable number.

168362986936321 is a deficient number, since it is larger than the sum of its proper divisors (388829069571).

168362986936321 is an equidigital number, since it uses as much as digits as its factorization.

168362986936321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388829069570.

The product of its digits is 725594112, while the sum is 73.

The spelling of 168362986936321 in words is "one hundred sixty-eight trillion, three hundred sixty-two billion, nine hundred eighty-six million, nine hundred thirty-six thousand, three hundred twenty-one".