688782923776 has 48 divisors (see below), whose sum is σ = 1377617197320. Its totient is φ = 344294522880.

The previous prime is 688782923761. The next prime is 688782923779. The reversal of 688782923776 is 677329287886.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 688782923699 and 688782923708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688782923779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525971 + ... + 7616941.

Almost surely, 2^688782923776 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 688782923776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688808598660).

688782923776 is an abundant number, since it is smaller than the sum of its proper divisors (688834273544).

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

688782923776 is an equidigital number, since it uses as much as digits as its factorization.

688782923776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94690 (or 94670 counting only the distinct ones).

The product of its digits is 682795008, while the sum is 73.

The spelling of 688782923776 in words is "six hundred eighty-eight billion, seven hundred eighty-two million, nine hundred twenty-three thousand, seven hundred seventy-six".