16445603544065 has 4 divisors (see below), whose sum is σ = 19734724252884. Its totient is φ = 13156482835248.

The previous prime is 16445603544059. The next prime is 16445603544091. The reversal of 16445603544065 is 56044530654461.

16445603544065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5674919719681 + 10770683824384 = 2382209^2 + 3281872^2 .

It is a cyclic number.

It is not a de Polignac number, because 16445603544065 - 2³⁴ = 16428423674881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16445603543998 and 16445603544016.

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, 1644560354402 + ... + 1644560354411.

It is an arithmetic number, because the mean of its divisors is an integer number (4933681063221).

Almost surely, 2^{16445603544065} is an apocalyptic number.

It is an amenable number.

16445603544065 is a deficient number, since it is larger than the sum of its proper divisors (3289120708819).

16445603544065 is an equidigital number, since it uses as much as digits as its factorization.

16445603544065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289120708818.

The product of its (nonzero) digits is 20736000, while the sum is 53.

The spelling of 16445603544065 in words is "sixteen trillion, four hundred forty-five billion, six hundred three million, five hundred forty-four thousand, sixty-five".