845330232217 has 2 divisors, whose sum is σ = 845330232218. Its totient is φ = 845330232216.

The previous prime is 845330232163. The next prime is 845330232293. The reversal of 845330232217 is 712232033548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585537161616 + 259793070601 = 765204^2 + 509699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845330232217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 845330232217.

It is not a weakly prime, because it can be changed into another prime (845330232317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422665116108 + 422665116109.

It is an arithmetic number, because the mean of its divisors is an integer number (422665116109).

Almost surely, 2^845330232217 is an apocalyptic number.

It is an amenable number.

845330232217 is a deficient number, since it is larger than the sum of its proper divisors (1).

845330232217 is an equidigital number, since it uses as much as digits as its factorization.

845330232217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 845330232217 in words is "eight hundred forty-five billion, three hundred thirty million, two hundred thirty-two thousand, two hundred seventeen".