16444520021417 has 16 divisors (see below), whose sum is σ = 16805213683200. Its totient is φ = 16084280372160.

The previous prime is 16444520021407. The next prime is 16444520021429. The reversal of 16444520021417 is 71412002544461.

It is a cyclic number.

It is not a de Polignac number, because 16444520021417 - 2⁸ = 16444520021161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16444520021407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508456667 + ... + 508489007.

It is an arithmetic number, because the mean of its divisors is an integer number (1050325855200).

Almost surely, 2^{16444520021417} is an apocalyptic number.

It is an amenable number.

16444520021417 is a deficient number, since it is larger than the sum of its proper divisors (360693661783).

16444520021417 is a wasteful number, since it uses less digits than its factorization.

16444520021417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39016.

The product of its (nonzero) digits is 215040, while the sum is 41.

Adding to 16444520021417 its reverse (71412002544461), we get a palindrome (87856522565878).

The spelling of 16444520021417 in words is "sixteen trillion, four hundred forty-four billion, five hundred twenty million, twenty-one thousand, four hundred seventeen".