688881319375 has 20 divisors (see below), whose sum is σ = 861062203144. Its totient is φ = 550953900000.

The previous prime is 688881319349. The next prime is 688881319381. The reversal of 688881319375 is 573913188886.

688881319375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688881319375 - 2²¹ = 688879222223 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688881319375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2157565 + ... + 2456185.

Almost surely, 2^688881319375 is an apocalyptic number.

688881319375 is a deficient number, since it is larger than the sum of its proper divisors (172180883769).

688881319375 is an equidigital number, since it uses as much as digits as its factorization.

688881319375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302332 (or 302317 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 67.

The spelling of 688881319375 in words is "six hundred eighty-eight billion, eight hundred eighty-one million, three hundred nineteen thousand, three hundred seventy-five".