684921295356 has 24 divisors (see below), whose sum is σ = 1598201238144. Its totient is φ = 228299734320.

The previous prime is 684921295349. The next prime is 684921295361. The reversal of 684921295356 is 653592129486.

It is a self number, because there is not a number n which added to its sum of digits gives 684921295356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526230 + ... + 1283261.

It is an arithmetic number, because the mean of its divisors is an integer number (66591718256).

Almost surely, 2^684921295356 is an apocalyptic number.

It is an amenable number.

684921295356 is an abundant number, since it is smaller than the sum of its proper divisors (913279942788).

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

684921295356 is a wasteful number, since it uses less digits than its factorization.

684921295356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841041 (or 1841039 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 684921295356 in words is "six hundred eighty-four billion, nine hundred twenty-one million, two hundred ninety-five thousand, three hundred fifty-six".