180836168281 has 2 divisors, whose sum is σ = 180836168282. Its totient is φ = 180836168280.

The previous prime is 180836168267. The next prime is 180836168297. The reversal of 180836168281 is 182861638081.

180836168281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179081312400 + 1754855881 = 423180^2 + 41891^2 .

It is a cyclic number.

It is not a de Polignac number, because 180836168281 - 2⁹ = 180836167769 is a prime.

It is a super-2 number, since 2×180836168281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (180836168581) 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, 90418084140 + 90418084141.

It is an arithmetic number, because the mean of its divisors is an integer number (90418084141).

Almost surely, 2^180836168281 is an apocalyptic number.

It is an amenable number.

180836168281 is a deficient number, since it is larger than the sum of its proper divisors (1).

180836168281 is an equidigital number, since it uses as much as digits as its factorization.

180836168281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 180836168281 in words is "one hundred eighty billion, eight hundred thirty-six million, one hundred sixty-eight thousand, two hundred eighty-one".