16684443613 has 2 divisors, whose sum is σ = 16684443614. Its totient is φ = 16684443612.

The previous prime is 16684443563. The next prime is 16684443617. The reversal of 16684443613 is 31634448661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15262625764 + 1421817849 = 123542^2 + 37707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16684443613 is a prime.

It is a super-3 number, since 3×16684443613³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16684443617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342221806 + 8342221807.

It is an arithmetic number, because the mean of its divisors is an integer number (8342221807).

Almost surely, 2^16684443613 is an apocalyptic number.

It is an amenable number.

16684443613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16684443613 is an equidigital number, since it uses as much as digits as its factorization.

16684443613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 46.

The spelling of 16684443613 in words is "sixteen billion, six hundred eighty-four million, four hundred forty-three thousand, six hundred thirteen".