168221320769941 has 16 divisors (see below), whose sum is σ = 170479193068800. Its totient is φ = 165976475208768.

The previous prime is 168221320769899. The next prime is 168221320769963. The reversal of 168221320769941 is 149967023122861.

It is a cyclic number.

It is not a de Polignac number, because 168221320769941 - 2¹⁷ = 168221320638869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168221320769941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168221320769981) 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 15 ways as a sum of consecutive naturals, for example, 2026648146 + ... + 2026731148.

It is an arithmetic number, because the mean of its divisors is an integer number (10654949566800).

Almost surely, 2^{168221320769941} is an apocalyptic number.

It is an amenable number.

168221320769941 is a deficient number, since it is larger than the sum of its proper divisors (2257872298859).

168221320769941 is a wasteful number, since it uses less digits than its factorization.

168221320769941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161148.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 168221320769941 in words is "one hundred sixty-eight trillion, two hundred twenty-one billion, three hundred twenty million, seven hundred sixty-nine thousand, nine hundred forty-one".