16444173590917 has 2 divisors, whose sum is σ = 16444173590918. Its totient is φ = 16444173590916.

The previous prime is 16444173590899. The next prime is 16444173590947. The reversal of 16444173590917 is 71909537144461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9507318559236 + 6936855031681 = 3083394^2 + 2633791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16444173590917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16444173590947) 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, 8222086795458 + 8222086795459.

It is an arithmetic number, because the mean of its divisors is an integer number (8222086795459).

Almost surely, 2^{16444173590917} is an apocalyptic number.

It is an amenable number.

16444173590917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16444173590917 is an equidigital number, since it uses as much as digits as its factorization.

16444173590917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 16444173590917 in words is "sixteen trillion, four hundred forty-four billion, one hundred seventy-three million, five hundred ninety thousand, nine hundred seventeen".