686648846686 has 32 divisors (see below), whose sum is σ = 1201056304896. Its totient is φ = 291261432000.

The previous prime is 686648846657. The next prime is 686648846711.

686648846686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16528200 + ... + 16569691.

It is an arithmetic number, because the mean of its divisors is an integer number (37533009528).

Almost surely, 2^686648846686 is an apocalyptic number.

686648846686 is a deficient number, since it is larger than the sum of its proper divisors (514407458210).

686648846686 is a wasteful number, since it uses less digits than its factorization.

686648846686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33097968.

The product of its digits is 3057647616, while the sum is 76.

The spelling of 686648846686 in words is "six hundred eighty-six billion, six hundred forty-eight million, eight hundred forty-six thousand, six hundred eighty-six".