680109317688 has 96 divisors (see below), whose sum is σ = 1766099911680. Its totient is φ = 218240049600.

The previous prime is 680109317683. The next prime is 680109317729. The reversal of 680109317688 is 886713901086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680109317683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4328031 + ... + 4482417.

It is an arithmetic number, because the mean of its divisors is an integer number (18396874080).

Almost surely, 2^680109317688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680109317688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883049955840).

680109317688 is an abundant number, since it is smaller than the sum of its proper divisors (1085990593992).

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

680109317688 is a wasteful number, since it uses less digits than its factorization.

680109317688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154649 (or 154614 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 57.

The spelling of 680109317688 in words is "six hundred eighty billion, one hundred nine million, three hundred seventeen thousand, six hundred eighty-eight".