168585051181 has 2 divisors, whose sum is σ = 168585051182. Its totient is φ = 168585051180.

The previous prime is 168585051119. The next prime is 168585051221. The reversal of 168585051181 is 181150585861.

168585051181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144407600100 + 24177451081 = 380010^2 + 155491^2 .

It is a cyclic number.

It is not a de Polignac number, because 168585051181 - 2¹⁷ = 168584920109 is a prime.

It is a super-2 number, since 2×168585051181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168580051181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84292525590 + 84292525591.

It is an arithmetic number, because the mean of its divisors is an integer number (84292525591).

Almost surely, 2^168585051181 is an apocalyptic number.

It is an amenable number.

168585051181 is a deficient number, since it is larger than the sum of its proper divisors (1).

168585051181 is an equidigital number, since it uses as much as digits as its factorization.

168585051181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 49.

The spelling of 168585051181 in words is "one hundred sixty-eight billion, five hundred eighty-five million, fifty-one thousand, one hundred eighty-one".