1685120668 has 48 divisors (see below), whose sum is σ = 3836496384. Its totient is φ = 627992640.

The previous prime is 1685120629. The next prime is 1685120683. The reversal of 1685120668 is 8660215861.

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, 111855 + ... + 126022.

It is an arithmetic number, because the mean of its divisors is an integer number (79927008).

Almost surely, 2^1685120668 is an apocalyptic number.

It is an amenable number.

1685120668 is an abundant number, since it is smaller than the sum of its proper divisors (2151375716).

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

1685120668 is a wasteful number, since it uses less digits than its factorization.

1685120668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237922 (or 237920 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1685120668 is about 41050.2212905119. The cubic root of 1685120668 is about 1189.9909770283.

The spelling of 1685120668 in words is "one billion, six hundred eighty-five million, one hundred twenty thousand, six hundred sixty-eight".