681348688868 has 12 divisors (see below), whose sum is σ = 1192556005872. Its totient is φ = 340618401480.

The previous prime is 681348688849. The next prime is 681348688907. The reversal of 681348688868 is 868886843186.

It is a junction number, because it is equal to n+sod(n) for n = 681348688795 and 681348688804.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13958330 + ... + 14007057.

It is an arithmetic number, because the mean of its divisors is an integer number (99379667156).

Almost surely, 2^681348688868 is an apocalyptic number.

It is an amenable number.

681348688868 is a deficient number, since it is larger than the sum of its proper divisors (511207317004).

681348688868 is a wasteful number, since it uses less digits than its factorization.

681348688868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27971482 (or 27971480 counting only the distinct ones).

The product of its digits is 679477248, while the sum is 74.

The spelling of 681348688868 in words is "six hundred eighty-one billion, three hundred forty-eight million, six hundred eighty-eight thousand, eight hundred sixty-eight".