185064531217 has 2 divisors, whose sum is σ = 185064531218. Its totient is φ = 185064531216.

The previous prime is 185064531209. The next prime is 185064531221. The reversal of 185064531217 is 712135460581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109148301376 + 75916229841 = 330376^2 + 275529^2 .

It is a cyclic number.

It is not a de Polignac number, because 185064531217 - 2³ = 185064531209 is a prime.

It is not a weakly prime, because it can be changed into another prime (185064531247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92532265608 + 92532265609.

It is an arithmetic number, because the mean of its divisors is an integer number (92532265609).

Almost surely, 2^185064531217 is an apocalyptic number.

It is an amenable number.

185064531217 is a deficient number, since it is larger than the sum of its proper divisors (1).

185064531217 is an equidigital number, since it uses as much as digits as its factorization.

185064531217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

Adding to 185064531217 its reverse (712135460581), we get a palindrome (897199991798).

The spelling of 185064531217 in words is "one hundred eighty-five billion, sixty-four million, five hundred thirty-one thousand, two hundred seventeen".