685652069427870 has 16 divisors (see below), whose sum is σ = 1645564966626960. Its totient is φ = 182840551847424.

The previous prime is 685652069427869. The next prime is 685652069427917. The reversal of 685652069427870 is 78724960256586.

It is a junction number, because it is equal to n+sod(n) for n = 685652069427792 and 685652069427801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11427534490435 + ... + 11427534490494.

It is an arithmetic number, because the mean of its divisors is an integer number (102847810414185).

Almost surely, 2^{685652069427870} is an apocalyptic number.

685652069427870 is an abundant number, since it is smaller than the sum of its proper divisors (959912897199090).

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

685652069427870 is a wasteful number, since it uses less digits than its factorization.

685652069427870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22855068980939.

The product of its (nonzero) digits is 2438553600, while the sum is 75.

The spelling of 685652069427870 in words is "six hundred eighty-five trillion, six hundred fifty-two billion, sixty-nine million, four hundred twenty-seven thousand, eight hundred seventy".