16684185016839 has 4 divisors (see below), whose sum is σ = 22245580022456. Its totient is φ = 11122790011224.

The previous prime is 16684185016819. The next prime is 16684185016841. The reversal of 16684185016839 is 93861058148661.

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

It is a de Polignac number, because none of the positive numbers 2^k-16684185016839 is a prime.

It is a super-2 number, since 2×16684185016839² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16684185016839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16684185016819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780697502804 + ... + 2780697502809.

It is an arithmetic number, because the mean of its divisors is an integer number (5561395005614).

Almost surely, 2^{16684185016839} is an apocalyptic number.

16684185016839 is a deficient number, since it is larger than the sum of its proper divisors (5561395005617).

16684185016839 is an equidigital number, since it uses as much as digits as its factorization.

16684185016839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561395005616.

The product of its (nonzero) digits is 59719680, while the sum is 66.

The spelling of 16684185016839 in words is "sixteen trillion, six hundred eighty-four billion, one hundred eighty-five million, sixteen thousand, eight hundred thirty-nine".