818852742217 has 2 divisors, whose sum is σ = 818852742218. Its totient is φ = 818852742216.

The previous prime is 818852742163. The next prime is 818852742233. The reversal of 818852742217 is 712247258818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741362328576 + 77490413641 = 861024^2 + 278371^2 .

It is a cyclic number.

It is not a de Polignac number, because 818852742217 - 2⁷ = 818852742089 is a prime.

It is not a weakly prime, because it can be changed into another prime (818852842217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409426371108 + 409426371109.

It is an arithmetic number, because the mean of its divisors is an integer number (409426371109).

Almost surely, 2^818852742217 is an apocalyptic number.

It is an amenable number.

818852742217 is a deficient number, since it is larger than the sum of its proper divisors (1).

818852742217 is an equidigital number, since it uses as much as digits as its factorization.

818852742217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4014080, while the sum is 55.

The spelling of 818852742217 in words is "eight hundred eighteen billion, eight hundred fifty-two million, seven hundred forty-two thousand, two hundred seventeen".