16684351613 has 2 divisors, whose sum is σ = 16684351614. Its totient is φ = 16684351612.

The previous prime is 16684351589. The next prime is 16684351627. The reversal of 16684351613 is 31615348661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16559314489 + 125037124 = 128683^2 + 11182^2 .

It is a cyclic number.

It is not a de Polignac number, because 16684351613 - 2¹⁰ = 16684350589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16684351643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342175806 + 8342175807.

It is an arithmetic number, because the mean of its divisors is an integer number (8342175807).

Almost surely, 2^16684351613 is an apocalyptic number.

It is an amenable number.

16684351613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16684351613 is an equidigital number, since it uses as much as digits as its factorization.

16684351613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The spelling of 16684351613 in words is "sixteen billion, six hundred eighty-four million, three hundred fifty-one thousand, six hundred thirteen".