688683185387 has 16 divisors (see below), whose sum is σ = 732204621792. Its totient is φ = 645498992640.

The previous prime is 688683185381. The next prime is 688683185413. The reversal of 688683185387 is 783581386886.

It is a cyclic number.

It is not a de Polignac number, because 688683185387 - 2¹⁰ = 688683184363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688683185387.

It is not an unprimeable number, because it can be changed into a prime (688683185381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8238143 + ... + 8321319.

It is an arithmetic number, because the mean of its divisors is an integer number (45762788862).

Almost surely, 2^688683185387 is an apocalyptic number.

688683185387 is a deficient number, since it is larger than the sum of its proper divisors (43521436405).

688683185387 is a wasteful number, since it uses less digits than its factorization.

688683185387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85198.

The product of its digits is 371589120, while the sum is 71.

The spelling of 688683185387 in words is "six hundred eighty-eight billion, six hundred eighty-three million, one hundred eighty-five thousand, three hundred eighty-seven".