16943427685 has 4 divisors (see below), whose sum is σ = 20332113228. Its totient is φ = 13554742144.

The previous prime is 16943427679. The next prime is 16943427763. The reversal of 16943427685 is 58672434961.

16943427685 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 3624882849 + 13318544836 = 60207^2 + 115406^2 .

It is a cyclic number.

It is not a de Polignac number, because 16943427685 - 2⁹ = 16943427173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694342764 + ... + 1694342773.

It is an arithmetic number, because the mean of its divisors is an integer number (5083028307).

Almost surely, 2^16943427685 is an apocalyptic number.

It is an amenable number.

16943427685 is a deficient number, since it is larger than the sum of its proper divisors (3388685543).

16943427685 is an equidigital number, since it uses as much as digits as its factorization.

16943427685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388685542.

The product of its digits is 8709120, while the sum is 55.

The spelling of 16943427685 in words is "sixteen billion, nine hundred forty-three million, four hundred twenty-seven thousand, six hundred eighty-five".