185980358189 has 2 divisors, whose sum is σ = 185980358190. Its totient is φ = 185980358188.

The previous prime is 185980358131. The next prime is 185980358209. The reversal of 185980358189 is 981853089581.

185980358189 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., 139216295689 + 46764062500 = 373117^2 + 216250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185980358189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185980358129) 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, 92990179094 + 92990179095.

It is an arithmetic number, because the mean of its divisors is an integer number (92990179095).

Almost surely, 2^185980358189 is an apocalyptic number.

It is an amenable number.

185980358189 is a deficient number, since it is larger than the sum of its proper divisors (1).

185980358189 is an equidigital number, since it uses as much as digits as its factorization.

185980358189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24883200, while the sum is 65.

The spelling of 185980358189 in words is "one hundred eighty-five billion, nine hundred eighty million, three hundred fifty-eight thousand, one hundred eighty-nine".