688328642173 has 32 divisors (see below), whose sum is σ = 716903516160. Its totient is φ = 660472151040.

The previous prime is 688328642129. The next prime is 688328642189. The reversal of 688328642173 is 371246823886.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 688328642173 - 2²⁵ = 688295087741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688328642273) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 395363083 + ... + 395364823.

It is an arithmetic number, because the mean of its divisors is an integer number (22403234880).

Almost surely, 2^688328642173 is an apocalyptic number.

It is an amenable number.

688328642173 is a deficient number, since it is larger than the sum of its proper divisors (28574873987).

688328642173 is a wasteful number, since it uses less digits than its factorization.

688328642173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557.

The product of its digits is 18579456, while the sum is 58.

The spelling of 688328642173 in words is "six hundred eighty-eight billion, three hundred twenty-eight million, six hundred forty-two thousand, one hundred seventy-three".