688720866472 has 16 divisors (see below), whose sum is σ = 1294116838560. Its totient is φ = 343623042864.

The previous prime is 688720866469. The next prime is 688720866481. The reversal of 688720866472 is 274668027886.

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, 92169828 + ... + 92177299.

It is an arithmetic number, because the mean of its divisors is an integer number (80882302410).

Almost surely, 2^688720866472 is an apocalyptic number.

It is an amenable number.

688720866472 is a deficient number, since it is larger than the sum of its proper divisors (605395972088).

688720866472 is a wasteful number, since it uses less digits than its factorization.

688720866472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184347600 (or 184347596 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 64.

The spelling of 688720866472 in words is "six hundred eighty-eight billion, seven hundred twenty million, eight hundred sixty-six thousand, four hundred seventy-two".