685370350020 has 48 divisors (see below), whose sum is σ = 1919420939520. Its totient is φ = 182728859136.

The previous prime is 685370350009. The next prime is 685370350061. The reversal of 685370350020 is 20053073586.

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 15 ways as a sum of consecutive naturals, for example, 839692 + ... + 1440771.

It is an arithmetic number, because the mean of its divisors is an integer number (39987936240).

Almost surely, 2^685370350020 is an apocalyptic number.

685370350020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685370350020 is an abundant number, since it is smaller than the sum of its proper divisors (1234050589500).

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

685370350020 is a wasteful number, since it uses less digits than its factorization.

685370350020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285484 (or 2285482 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 685370350020 in words is "six hundred eighty-five billion, three hundred seventy million, three hundred fifty thousand, twenty".