688789894992 has 20 divisors (see below), whose sum is σ = 1779373895520. Its totient is φ = 229596631648.

The previous prime is 688789894943. The next prime is 688789895009. The reversal of 688789894992 is 299498987886.

It is a junction number, because it is equal to n+sod(n) for n = 688789894899 and 688789894908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7174894692 + ... + 7174894787.

It is an arithmetic number, because the mean of its divisors is an integer number (88968694776).

Almost surely, 2^688789894992 is an apocalyptic number.

It is an amenable number.

688789894992 is an abundant number, since it is smaller than the sum of its proper divisors (1090584000528).

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

688789894992 is a wasteful number, since it uses less digits than its factorization.

688789894992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14349789490 (or 14349789484 counting only the distinct ones).

The product of its digits is 9029615616, while the sum is 87.

The spelling of 688789894992 in words is "six hundred eighty-eight billion, seven hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred ninety-two".