688448994568 has 32 divisors (see below), whose sum is σ = 1297012036320. Its totient is φ = 342582768000.

The previous prime is 688448994553. The next prime is 688448994581. The reversal of 688448994568 is 865499844886.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1284348 + ... + 1739668.

It is an arithmetic number, because the mean of its divisors is an integer number (40531626135).

Almost surely, 2^688448994568 is an apocalyptic number.

It is an amenable number.

688448994568 is a deficient number, since it is larger than the sum of its proper divisors (608563041752).

688448994568 is a wasteful number, since it uses less digits than its factorization.

688448994568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456229 (or 456225 counting only the distinct ones).

The product of its digits is 3822059520, while the sum is 79.

The spelling of 688448994568 in words is "six hundred eighty-eight billion, four hundred forty-eight million, nine hundred ninety-four thousand, five hundred sixty-eight".