685931924046720 has 128 divisors (see below), whose sum is σ = 2354593239361440. Its totient is φ = 168844781297664.

The previous prime is 685931924046679. The next prime is 685931924046767. The reversal of 685931924046720 is 27640429139586.

685931924046720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13740598519 + ... + 13740648438.

It is a 1-persistent number, because it is pandigital, but 2⋅685931924046720 = 1371863848093440 is not.

Almost surely, 2^{685931924046720} is an apocalyptic number.

685931924046720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685931924046720 is an abundant number, since it is smaller than the sum of its proper divisors (1668661315314720).

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

685931924046720 is a wasteful number, since it uses less digits than its factorization.

685931924046720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27481246992 (or 27481246980 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 66.

The spelling of 685931924046720 in words is "six hundred eighty-five trillion, nine hundred thirty-one billion, nine hundred twenty-four million, forty-six thousand, seven hundred twenty".