688820068080 has 60 divisors (see below), whose sum is σ = 2313287397720. Its totient is φ = 183685351296.

The previous prime is 688820067997. The next prime is 688820068087. The reversal of 688820068080 is 80860028886.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688820068087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 478346550 + ... + 478347989.

It is an arithmetic number, because the mean of its divisors is an integer number (38554789962).

Almost surely, 2^688820068080 is an apocalyptic number.

688820068080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688820068080 is an abundant number, since it is smaller than the sum of its proper divisors (1624467329640).

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

688820068080 is a wasteful number, since it uses less digits than its factorization.

688820068080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956694558 (or 956694549 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The spelling of 688820068080 in words is "six hundred eighty-eight billion, eight hundred twenty million, sixty-eight thousand, eighty".