845332173617 has 2 divisors, whose sum is σ = 845332173618. Its totient is φ = 845332173616.

The previous prime is 845332173593. The next prime is 845332173649. The reversal of 845332173617 is 716371233548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746134891681 + 99197281936 = 863791^2 + 314956^2 .

It is a cyclic number.

It is not a de Polignac number, because 845332173617 - 2³⁴ = 828152304433 is a prime.

It is not a weakly prime, because it can be changed into another prime (845332133617) 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, 422666086808 + 422666086809.

It is an arithmetic number, because the mean of its divisors is an integer number (422666086809).

Almost surely, 2^845332173617 is an apocalyptic number.

It is an amenable number.

845332173617 is a deficient number, since it is larger than the sum of its proper divisors (1).

845332173617 is an equidigital number, since it uses as much as digits as its factorization.

845332173617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 50.

The spelling of 845332173617 in words is "eight hundred forty-five billion, three hundred thirty-two million, one hundred seventy-three thousand, six hundred seventeen".