688660704448 has 28 divisors (see below), whose sum is σ = 1366690314112. Its totient is φ = 344297790720.

The previous prime is 688660704419. The next prime is 688660704463. The reversal of 688660704448 is 844407066886.

It is a happy 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, 180538 + ... + 1187398.

Almost surely, 2^688660704448 is an apocalyptic number.

It is an amenable number.

688660704448 is a deficient number, since it is larger than the sum of its proper divisors (678029609664).

688660704448 is a wasteful number, since it uses less digits than its factorization.

688660704448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017560 (or 1017550 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 61.

The spelling of 688660704448 in words is "six hundred eighty-eight billion, six hundred sixty million, seven hundred four thousand, four hundred forty-eight".