68018165161 has 2 divisors, whose sum is σ = 68018165162. Its totient is φ = 68018165160.

The previous prime is 68018165153. The next prime is 68018165221. The reversal of 68018165161 is 16156181086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64684257561 + 3333907600 = 254331^2 + 57740^2 .

It is a cyclic number.

It is not a de Polignac number, because 68018165161 - 2³ = 68018165153 is a prime.

It is not a weakly prime, because it can be changed into another prime (68018165561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34009082580 + 34009082581.

It is an arithmetic number, because the mean of its divisors is an integer number (34009082581).

Almost surely, 2^68018165161 is an apocalyptic number.

It is an amenable number.

68018165161 is a deficient number, since it is larger than the sum of its proper divisors (1).

68018165161 is an equidigital number, since it uses as much as digits as its factorization.

68018165161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 68018165161 in words is "sixty-eight billion, eighteen million, one hundred sixty-five thousand, one hundred sixty-one".