168101516321 has 2 divisors, whose sum is σ = 168101516322. Its totient is φ = 168101516320.

The previous prime is 168101516309. The next prime is 168101516431. The reversal of 168101516321 is 123615101861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142212706321 + 25888810000 = 377111^2 + 160900^2 .

It is a cyclic number.

It is not a de Polignac number, because 168101516321 - 2¹⁰ = 168101515297 is a prime.

It is not a weakly prime, because it can be changed into another prime (168101536321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84050758160 + 84050758161.

It is an arithmetic number, because the mean of its divisors is an integer number (84050758161).

Almost surely, 2^168101516321 is an apocalyptic number.

It is an amenable number.

168101516321 is a deficient number, since it is larger than the sum of its proper divisors (1).

168101516321 is an equidigital number, since it uses as much as digits as its factorization.

168101516321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 168101516321 in words is "one hundred sixty-eight billion, one hundred one million, five hundred sixteen thousand, three hundred twenty-one".