6817581868 has 12 divisors (see below), whose sum is σ = 11984271040. Its totient is φ = 3393504432.

The previous prime is 6817581863. The next prime is 6817581877. The reversal of 6817581868 is 8681857186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6817581863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3820623 + ... + 3822406.

Almost surely, 2^6817581868 is an apocalyptic number.

It is an amenable number.

6817581868 is a deficient number, since it is larger than the sum of its proper divisors (5166689172).

6817581868 is a wasteful number, since it uses less digits than its factorization.

6817581868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643256 (or 7643254 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 58.

The square root of 6817581868 is about 82568.6494257960. The cubic root of 6817581868 is about 1896.1678872829.

The spelling of 6817581868 in words is "six billion, eight hundred seventeen million, five hundred eighty-one thousand, eight hundred sixty-eight".