6816920689 has 8 divisors (see below), whose sum is σ = 6862458240. Its totient is φ = 6771410256.

The previous prime is 6816920687. The next prime is 6816920743. The reversal of 6816920689 is 9860296186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6816920689 - 2¹ = 6816920687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6816920687) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 856872 + ... + 864790.

It is an arithmetic number, because the mean of its divisors is an integer number (857807280).

Almost surely, 2^6816920689 is an apocalyptic number.

It is an amenable number.

6816920689 is a deficient number, since it is larger than the sum of its proper divisors (45537551).

6816920689 is a wasteful number, since it uses less digits than its factorization.

6816920689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13559.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 6816920689 is about 82564.6455148934. The cubic root of 6816920689 is about 1896.1065875952.

The spelling of 6816920689 in words is "six billion, eight hundred sixteen million, nine hundred twenty thousand, six hundred eighty-nine".