6381681116388 has 24 divisors (see below), whose sum is σ = 14893454644992. Its totient is φ = 2126817699744.

The previous prime is 6381681116357. The next prime is 6381681116389. The reversal of 6381681116388 is 8836111861836.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6381681116389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51102420 + ... + 51227147.

It is an arithmetic number, because the mean of its divisors is an integer number (620560610208).

Almost surely, 2^{6381681116388} is an apocalyptic number.

It is an amenable number.

6381681116388 is an abundant number, since it is smaller than the sum of its proper divisors (8511773528604).

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

6381681116388 is a wasteful number, since it uses less digits than its factorization.

6381681116388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102334771 (or 102334769 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 60.

The spelling of 6381681116388 in words is "six trillion, three hundred eighty-one billion, six hundred eighty-one million, one hundred sixteen thousand, three hundred eighty-eight".