6815802320 has 20 divisors (see below), whose sum is σ = 15846740580. Its totient is φ = 2726320896.

The previous prime is 6815802317. The next prime is 6815802377. The reversal of 6815802320 is 232085186.

It can be written as a sum of positive squares in 2 ways, for example, as 3827649424 + 2988152896 = 61868^2 + 54664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6815802320² = 92910322530634764800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42598685 + ... + 42598844.

It is an arithmetic number, because the mean of its divisors is an integer number (792337029).

Almost surely, 2^6815802320 is an apocalyptic number.

It is an amenable number.

6815802320 is an abundant number, since it is smaller than the sum of its proper divisors (9030938260).

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

6815802320 is a wasteful number, since it uses less digits than its factorization.

6815802320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85197542 (or 85197536 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 6815802320 is about 82557.8725501088. The cubic root of 6815802320 is about 1896.0028915669.

The spelling of 6815802320 in words is "six billion, eight hundred fifteen million, eight hundred two thousand, three hundred twenty".