6817916819 has 16 divisors (see below), whose sum is σ = 7858488000. Its totient is φ = 5794136064.

The previous prime is 6817916789. The next prime is 6817916821. The reversal of 6817916819 is 9186197186.

It is a cyclic number.

It is not a de Polignac number, because 6817916819 - 2²⁸ = 6549481363 is a prime.

It is a super-2 number, since 2×6817916819² = 92967979501606157522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6817916879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596147 + ... + 607475.

It is an arithmetic number, because the mean of its divisors is an integer number (491155500).

Almost surely, 2^6817916819 is an apocalyptic number.

6817916819 is a deficient number, since it is larger than the sum of its proper divisors (1040571181).

6817916819 is a wasteful number, since it uses less digits than its factorization.

6817916819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12062.

The product of its digits is 1306368, while the sum is 56.

The square root of 6817916819 is about 82570.6777191516. The cubic root of 6817916819 is about 1896.1989399807.

The spelling of 6817916819 in words is "six billion, eight hundred seventeen million, nine hundred sixteen thousand, eight hundred nineteen".