684450328912 has 20 divisors (see below), whose sum is σ = 1515568585696. Its totient is φ = 293335855200.

The previous prime is 684450328847. The next prime is 684450328931. The reversal of 684450328912 is 219823054486.

It is a happy number.

684450328912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 684450328912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3055581714 + ... + 3055581937.

Almost surely, 2^684450328912 is an apocalyptic number.

It is an amenable number.

684450328912 is an abundant number, since it is smaller than the sum of its proper divisors (831118256784).

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

684450328912 is a wasteful number, since it uses less digits than its factorization.

684450328912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111163666 (or 6111163660 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 684450328912 in words is "six hundred eighty-four billion, four hundred fifty million, three hundred twenty-eight thousand, nine hundred twelve".