688395679124 has 12 divisors (see below), whose sum is σ = 1219941710400. Its totient is φ = 339840904728.

The previous prime is 688395679067. The next prime is 688395679141. The reversal of 688395679124 is 421976593886.

It is a super-2 number, since 2×688395679124² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (68) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089233354 + ... + 1089233985.

It is an arithmetic number, because the mean of its divisors is an integer number (101661809200).

Almost surely, 2^688395679124 is an apocalyptic number.

It is an amenable number.

688395679124 is a deficient number, since it is larger than the sum of its proper divisors (531546031276).

688395679124 is a wasteful number, since it uses less digits than its factorization.

688395679124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178467422 (or 2178467420 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 68.

The spelling of 688395679124 in words is "six hundred eighty-eight billion, three hundred ninety-five million, six hundred seventy-nine thousand, one hundred twenty-four".