681806710088 has 128 divisors (see below), whose sum is σ = 1563170400000. Its totient is φ = 272138600448.

The previous prime is 681806710063. The next prime is 681806710141. The reversal of 681806710088 is 880017608186.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89132888 + ... + 89140536.

It is an arithmetic number, because the mean of its divisors is an integer number (12212268750).

Almost surely, 2^681806710088 is an apocalyptic number.

681806710088 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681806710088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781585200000).

681806710088 is an abundant number, since it is smaller than the sum of its proper divisors (881363689912).

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

681806710088 is a wasteful number, since it uses less digits than its factorization.

681806710088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647 (or 8643 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 681806710088 in words is "six hundred eighty-one billion, eight hundred six million, seven hundred ten thousand, eighty-eight".