16684562789 has 4 divisors (see below), whose sum is σ = 16684828524. Its totient is φ = 16684297056.

The previous prime is 16684562771. The next prime is 16684562813. The reversal of 16684562789 is 98726548661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2226424225 + 14458138564 = 47185^2 + 120242^2 .

It is a cyclic number.

It is not a de Polignac number, because 16684562789 - 2⁸ = 16684562533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16684562729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19739 + ... + 183735.

It is an arithmetic number, because the mean of its divisors is an integer number (4171207131).

Almost surely, 2^16684562789 is an apocalyptic number.

It is an amenable number.

16684562789 is a deficient number, since it is larger than the sum of its proper divisors (265735).

16684562789 is a wasteful number, since it uses less digits than its factorization.

16684562789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265734.

The product of its digits is 34836480, while the sum is 62.

The spelling of 16684562789 in words is "sixteen billion, six hundred eighty-four million, five hundred sixty-two thousand, seven hundred eighty-nine".