168221320769939 has 8 divisors (see below), whose sum is σ = 171256160907168. Its totient is φ = 165195419780160.

The previous prime is 168221320769899. The next prime is 168221320769963. The reversal of 168221320769939 is 939967023122861.

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

It is a cyclic number.

It is not a de Polignac number, because 168221320769939 - 2¹⁶ = 168221320704403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168221320769989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2234748887 + ... + 2234824160.

It is an arithmetic number, because the mean of its divisors is an integer number (21407020113396).

Almost surely, 2^{168221320769939} is an apocalyptic number.

168221320769939 is a deficient number, since it is larger than the sum of its proper divisors (3034840137229).

168221320769939 is an equidigital number, since it uses as much as digits as its factorization.

168221320769939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469573725.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 168221320769939 in words is "one hundred sixty-eight trillion, two hundred twenty-one billion, three hundred twenty million, seven hundred sixty-nine thousand, nine hundred thirty-nine".