6681791356528 has 40 divisors (see below), whose sum is σ = 13707696111120. Its totient is φ = 3144327060480.

The previous prime is 6681791356523. The next prime is 6681791356543. The reversal of 6681791356528 is 8256531971866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681791356523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25607103 + ... + 25866721.

It is an arithmetic number, because the mean of its divisors is an integer number (342692402778).

Almost surely, 2^{6681791356528} is an apocalyptic number.

6681791356528 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6681791356528 is an abundant number, since it is smaller than the sum of its proper divisors (7025904754592).

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

6681791356528 is a wasteful number, since it uses less digits than its factorization.

6681791356528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354265 (or 354259 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 67.

The spelling of 6681791356528 in words is "six trillion, six hundred eighty-one billion, seven hundred ninety-one million, three hundred fifty-six thousand, five hundred twenty-eight".