684022282640 has 80 divisors (see below), whose sum is σ = 1633723077888. Its totient is φ = 266150711808.

The previous prime is 684022282633. The next prime is 684022282663. The reversal of 684022282640 is 46282220486.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 684022282591 and 684022282600.

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, 13540469 + ... + 13590891.

Almost surely, 2^684022282640 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 684022282640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816861538944).

684022282640 is an abundant number, since it is smaller than the sum of its proper divisors (949700795248).

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

684022282640 is a wasteful number, since it uses less digits than its factorization.

684022282640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55056 (or 55050 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 44.

The spelling of 684022282640 in words is "six hundred eighty-four billion, twenty-two million, two hundred eighty-two thousand, six hundred forty".