6816785039 has 4 divisors (see below), whose sum is σ = 6821262456. Its totient is φ = 6812307624.

The previous prime is 6816785033. The next prime is 6816785051. The reversal of 6816785039 is 9305876186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9305876186 = 2 ⋅4652938093.

It is a cyclic number.

It is not a de Polignac number, because 6816785039 - 2⁴ = 6816785023 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 (6816785033) 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, 2236424 + ... + 2239469.

It is an arithmetic number, because the mean of its divisors is an integer number (1705315614).

Almost surely, 2^6816785039 is an apocalyptic number.

6816785039 is a deficient number, since it is larger than the sum of its proper divisors (4477417).

6816785039 is a wasteful number, since it uses less digits than its factorization.

6816785039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477416.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 6816785039 is about 82563.8240332895. The cubic root of 6816785039 is about 1896.0940106280.

The spelling of 6816785039 in words is "six billion, eight hundred sixteen million, seven hundred eighty-five thousand, thirty-nine".