16444173852991 has 2 divisors, whose sum is σ = 16444173852992. Its totient is φ = 16444173852990.

The previous prime is 16444173852943. The next prime is 16444173853067. The reversal of 16444173852991 is 19925837144461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16444173852991 - 2¹¹ = 16444173850943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16444173832991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222086926495 + 8222086926496.

It is an arithmetic number, because the mean of its divisors is an integer number (8222086926496).

Almost surely, 2^{16444173852991} is an apocalyptic number.

16444173852991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16444173852991 is an equidigital number, since it uses as much as digits as its factorization.

16444173852991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 64.

The spelling of 16444173852991 in words is "sixteen trillion, four hundred forty-four billion, one hundred seventy-three million, eight hundred fifty-two thousand, nine hundred ninety-one".