16444610165 has 4 divisors (see below), whose sum is σ = 19733532204. Its totient is φ = 13155688128.

The previous prime is 16444610159. The next prime is 16444610197. The reversal of 16444610165 is 56101644461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56101644461 = 17 ⋅3300096733.

It can be written as a sum of positive squares in 2 ways, for example, as 2092330564 + 14352279601 = 45742^2 + 119801^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444610165 - 2¹² = 16444606069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1644461012 + ... + 1644461021.

It is an arithmetic number, because the mean of its divisors is an integer number (4933383051).

Almost surely, 2^16444610165 is an apocalyptic number.

It is an amenable number.

16444610165 is a deficient number, since it is larger than the sum of its proper divisors (3288922039).

16444610165 is an equidigital number, since it uses as much as digits as its factorization.

16444610165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288922038.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 16444610165 in words is "sixteen billion, four hundred forty-four million, six hundred ten thousand, one hundred sixty-five".