686555555686 has 64 divisors (see below), whose sum is σ = 1383193437696. Its totient is φ = 246827347200.

The previous prime is 686555555669. The next prime is 686555555723.

686555555686 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×686555555686³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5853841 + ... + 5969971.

It is an arithmetic number, because the mean of its divisors is an integer number (21612397464).

Almost surely, 2^686555555686 is an apocalyptic number.

686555555686 is an abundant number, since it is smaller than the sum of its proper divisors (696637882010).

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

686555555686 is a wasteful number, since it uses less digits than its factorization.

686555555686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119117.

The product of its digits is 1296000000, while the sum is 70.

The spelling of 686555555686 in words is "six hundred eighty-six billion, five hundred fifty-five million, five hundred fifty-five thousand, six hundred eighty-six".