16442144264165 has 4 divisors (see below), whose sum is σ = 19730573117004. Its totient is φ = 13153715411328.

The previous prime is 16442144264159. The next prime is 16442144264171. The reversal of 16442144264165 is 56146244124461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16442144264159) and next prime (16442144264171).

It can be written as a sum of positive squares in 2 ways, for example, as 2285896038724 + 14156248225441 = 1511918^2 + 3762479^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442144264165 - 2⁴ = 16442144264149 is a prime.

It is a super-3 number, since 3×16442144264165³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644214426412 + ... + 1644214426421.

It is an arithmetic number, because the mean of its divisors is an integer number (4932643279251).

Almost surely, 2^{16442144264165} is an apocalyptic number.

It is an amenable number.

16442144264165 is a deficient number, since it is larger than the sum of its proper divisors (3288428852839).

16442144264165 is an equidigital number, since it uses as much as digits as its factorization.

16442144264165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288428852838.

The product of its digits is 4423680, while the sum is 50.

The spelling of 16442144264165 in words is "sixteen trillion, four hundred forty-two billion, one hundred forty-four million, two hundred sixty-four thousand, one hundred sixty-five".