685313553220 has 96 divisors (see below), whose sum is σ = 1521342950400. Its totient is φ = 258596198784.

The previous prime is 685313553217. The next prime is 685313553259. The reversal of 685313553220 is 22355313586.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98362177 + ... + 98369143.

It is an arithmetic number, because the mean of its divisors is an integer number (15847322400).

Almost surely, 2^685313553220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685313553220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760671475200).

685313553220 is an abundant number, since it is smaller than the sum of its proper divisors (836029397180).

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

685313553220 is a wasteful number, since it uses less digits than its factorization.

685313553220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057 (or 8055 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 685313553220 in words is "six hundred eighty-five billion, three hundred thirteen million, five hundred fifty-three thousand, two hundred twenty".