6816981388336 has 20 divisors (see below), whose sum is σ = 15094744502992. Its totient is φ = 2921563452096.

The previous prime is 6816981388219. The next prime is 6816981388367. The reversal of 6816981388336 is 6338831896186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30432952515 + ... + 30432952738.

Almost surely, 2^{6816981388336} is an apocalyptic number.

It is an amenable number.

6816981388336 is an abundant number, since it is smaller than the sum of its proper divisors (8277763114656).

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

6816981388336 is a wasteful number, since it uses less digits than its factorization.

6816981388336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60865905268 (or 60865905262 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 70.

The spelling of 6816981388336 in words is "six trillion, eight hundred sixteen billion, nine hundred eighty-one million, three hundred eighty-eight thousand, three hundred thirty-six".