688668650264 has 16 divisors (see below), whose sum is σ = 1475718536400. Its totient is φ = 295143707232.

The previous prime is 688668650249. The next prime is 688668650287. The reversal of 688668650264 is 462056866886.

It is a self number, because there is not a number n which added to its sum of digits gives 688668650264.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6148827179 + ... + 6148827290.

It is an arithmetic number, because the mean of its divisors is an integer number (92232408525).

Almost surely, 2^688668650264 is an apocalyptic number.

It is an amenable number.

688668650264 is an abundant number, since it is smaller than the sum of its proper divisors (787049886136).

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

688668650264 is a wasteful number, since it uses less digits than its factorization.

688668650264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12297654482 (or 12297654478 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 65.

The spelling of 688668650264 in words is "six hundred eighty-eight billion, six hundred sixty-eight million, six hundred fifty thousand, two hundred sixty-four".