685938565839586 has 16 divisors (see below), whose sum is σ = 1040481753014520. Its totient is φ = 339111412182400.

The previous prime is 685938565839529. The next prime is 685938565839641.

It is a happy number.

685938565839586 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 653639019313225 + 32299546526361 = 25566365^2 + 5683269^2 .

It is a super-2 number, since 2×685938565839586² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685938565839494 and 685938565839503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10181641 + ... + 38412796.

Almost surely, 2^{685938565839586} is an apocalyptic number.

685938565839586 is a deficient number, since it is larger than the sum of its proper divisors (354543187174934).

685938565839586 is a wasteful number, since it uses less digits than its factorization.

685938565839586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48673829.

The product of its digits is 403107840000, while the sum is 94.

The spelling of 685938565839586 in words is "six hundred eighty-five trillion, nine hundred thirty-eight billion, five hundred sixty-five million, eight hundred thirty-nine thousand, five hundred eighty-six".