684083317585 has 4 divisors (see below), whose sum is σ = 820899981108. Its totient is φ = 547266654064.

The previous prime is 684083317573. The next prime is 684083317607. The reversal of 684083317585 is 585713380486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167169770496 + 516913547089 = 408864^2 + 718967^2 .

It is a cyclic number.

It is not a de Polignac number, because 684083317585 - 2²⁵ = 684049763153 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 68408331754 + ... + 68408331763.

It is an arithmetic number, because the mean of its divisors is an integer number (205224995277).

Almost surely, 2^684083317585 is an apocalyptic number.

It is an amenable number.

684083317585 is a deficient number, since it is larger than the sum of its proper divisors (136816663523).

684083317585 is a wasteful number, since it uses less digits than its factorization.

684083317585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136816663522.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 684083317585 in words is "six hundred eighty-four billion, eighty-three million, three hundred seventeen thousand, five hundred eighty-five".