688705313706 has 48 divisors (see below), whose sum is σ = 1511712611136. Its totient is φ = 226571345088.

The previous prime is 688705313683. The next prime is 688705313749. The reversal of 688705313706 is 607313507886.

688705313706 is a `hidden beast` number, since 6 + 8 + 8 + 70 + 531 + 37 + 0 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234126 + ... + 1703078.

It is an arithmetic number, because the mean of its divisors is an integer number (31494012732).

Almost surely, 2^688705313706 is an apocalyptic number.

688705313706 is an abundant number, since it is smaller than the sum of its proper divisors (823007297430).

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

688705313706 is a wasteful number, since it uses less digits than its factorization.

688705313706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470027 (or 470024 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 688705313706 in words is "six hundred eighty-eight billion, seven hundred five million, three hundred thirteen thousand, seven hundred six".