68163280181 has 2 divisors, whose sum is σ = 68163280182. Its totient is φ = 68163280180.

The previous prime is 68163280177. The next prime is 68163280187. The reversal of 68163280181 is 18108236186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45971219281 + 22192060900 = 214409^2 + 148970^2 .

It is a cyclic number.

It is not a de Polignac number, because 68163280181 - 2² = 68163280177 is a prime.

It is a super-2 number, since 2×68163280181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68163280187) 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 as a sum of consecutive naturals, namely, 34081640090 + 34081640091.

It is an arithmetic number, because the mean of its divisors is an integer number (34081640091).

Almost surely, 2^68163280181 is an apocalyptic number.

It is an amenable number.

68163280181 is a deficient number, since it is larger than the sum of its proper divisors (1).

68163280181 is an equidigital number, since it uses as much as digits as its factorization.

68163280181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 68163280181 in words is "sixty-eight billion, one hundred sixty-three million, two hundred eighty thousand, one hundred eighty-one".