684168851024 has 40 divisors (see below), whose sum is σ = 1395421967040. Its totient is φ = 324061959168.

The previous prime is 684168851017. The next prime is 684168851117. The reversal of 684168851024 is 420158861486.

It is a Cunningham number, because it is equal to 827145²-1.

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 7 ways as a sum of consecutive naturals, for example, 6565472 + ... + 6668864.

It is an arithmetic number, because the mean of its divisors is an integer number (34885549176).

Almost surely, 2^684168851024 is an apocalyptic number.

It is an amenable number.

684168851024 is an abundant number, since it is smaller than the sum of its proper divisors (711253116016).

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

684168851024 is a wasteful number, since it uses less digits than its factorization.

684168851024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125187 (or 125181 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 53.

The spelling of 684168851024 in words is "six hundred eighty-four billion, one hundred sixty-eight million, eight hundred fifty-one thousand, twenty-four".