688905608612 has 18 divisors (see below), whose sum is σ = 1305455747778. Its totient is φ = 317956434432.

The previous prime is 688905608603. The next prime is 688905608647. The reversal of 688905608612 is 216806509886.

688905608612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 89296978276 + 599608630336 = 298826^2 + 774344^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509544893 + ... + 509546244.

It is an arithmetic number, because the mean of its divisors is an integer number (72525319321).

Almost surely, 2^688905608612 is an apocalyptic number.

It is an amenable number.

688905608612 is a deficient number, since it is larger than the sum of its proper divisors (616550139166).

688905608612 is a wasteful number, since it uses less digits than its factorization.

688905608612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019091167 (or 1019091152 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 688905608612 in words is "six hundred eighty-eight billion, nine hundred five million, six hundred eight thousand, six hundred twelve".