688653136326 has 8 divisors (see below), whose sum is σ = 1377306272664. Its totient is φ = 229551045440.

The previous prime is 688653136277. The next prime is 688653136343. The reversal of 688653136326 is 623631356886.

It is a happy number.

688653136326 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

688653136326 is an admirable number.

It is a congruent 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, 57387761355 + ... + 57387761366.

It is an arithmetic number, because the mean of its divisors is an integer number (172163284083).

Almost surely, 2^688653136326 is an apocalyptic number.

688653136326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688653136326 is a wasteful number, since it uses less digits than its factorization.

688653136326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114775522726.

The product of its digits is 22394880, while the sum is 57.

The spelling of 688653136326 in words is "six hundred eighty-eight billion, six hundred fifty-three million, one hundred thirty-six thousand, three hundred twenty-six".