168350185109 has 2 divisors, whose sum is σ = 168350185110. Its totient is φ = 168350185108.

The previous prime is 168350185097. The next prime is 168350185189. The reversal of 168350185109 is 901581053861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87071026084 + 81279159025 = 295078^2 + 285095^2 .

It is a cyclic number.

It is not a de Polignac number, because 168350185109 - 2²⁸ = 168081749653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168350185189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84175092554 + 84175092555.

It is an arithmetic number, because the mean of its divisors is an integer number (84175092555).

Almost surely, 2^168350185109 is an apocalyptic number.

It is an amenable number.

168350185109 is a deficient number, since it is larger than the sum of its proper divisors (1).

168350185109 is an equidigital number, since it uses as much as digits as its factorization.

168350185109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 168350185109 in words is "one hundred sixty-eight billion, three hundred fifty million, one hundred eighty-five thousand, one hundred nine".