684802229217 has 32 divisors (see below), whose sum is σ = 950832449280. Its totient is φ = 437866141440.

The previous prime is 684802229119. The next prime is 684802229227. The reversal of 684802229217 is 712922208486.

It is not a de Polignac number, because 684802229217 - 2²⁰ = 684801180641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684802229217.

It is not an unprimeable number, because it can be changed into a prime (684802229227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23420667 + ... + 23449887.

It is an arithmetic number, because the mean of its divisors is an integer number (29713514040).

Almost surely, 2^684802229217 is an apocalyptic number.

It is an amenable number.

684802229217 is a deficient number, since it is larger than the sum of its proper divisors (266030220063).

684802229217 is a wasteful number, since it uses less digits than its factorization.

684802229217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31033.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 684802229217 in words is "six hundred eighty-four billion, eight hundred two million, two hundred twenty-nine thousand, two hundred seventeen".