6817319685 has 144 divisors (see below), whose sum is σ = 14054197248. Its totient is φ = 3042800640.

The previous prime is 6817319659. The next prime is 6817319687. The reversal of 6817319685 is 5869137186.

It is not a de Polignac number, because 6817319685 - 2¹³ = 6817311493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6817319687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4349772 + ... + 4351338.

It is an arithmetic number, because the mean of its divisors is an integer number (97598592).

Almost surely, 2^6817319685 is an apocalyptic number.

It is an amenable number.

6817319685 is an abundant number, since it is smaller than the sum of its proper divisors (7236877563).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6817319685 is a wasteful number, since it uses less digits than its factorization.

6817319685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1650 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 6817319685 is about 82567.0617437729. The cubic root of 6817319685 is about 1896.1435800643.

The spelling of 6817319685 in words is "six billion, eight hundred seventeen million, three hundred nineteen thousand, six hundred eighty-five".