688751946772 has 12 divisors (see below), whose sum is σ = 1206188701396. Its totient is φ = 344126603520.

The previous prime is 688751946761. The next prime is 688751946793. The reversal of 688751946772 is 277649157886.

It can be written as a sum of positive squares in 2 ways, for example, as 534048177796 + 154703768976 = 730786^2 + 393324^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62336253 + ... + 62347300.

Almost surely, 2^688751946772 is an apocalyptic number.

It is an amenable number.

688751946772 is a deficient number, since it is larger than the sum of its proper divisors (517436754624).

688751946772 is a wasteful number, since it uses less digits than its factorization.

688751946772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124684938 (or 124684936 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 70.

The spelling of 688751946772 in words is "six hundred eighty-eight billion, seven hundred fifty-one million, nine hundred forty-six thousand, seven hundred seventy-two".