688692820608 has 128 divisors (see below), whose sum is σ = 2188954353600. Its totient is φ = 211905469440.

The previous prime is 688692820573. The next prime is 688692820637. The reversal of 688692820608 is 806028296886.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7619478 + ... + 7709333.

Almost surely, 2^688692820608 is an apocalyptic number.

It is an amenable number.

688692820608 is an abundant number, since it is smaller than the sum of its proper divisors (1500261532992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688692820608 is a wasteful number, since it uses less digits than its factorization.

688692820608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15328847 (or 15328829 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 688692820608 in words is "six hundred eighty-eight billion, six hundred ninety-two million, eight hundred twenty thousand, six hundred eight".