686321164 has 6 divisors (see below), whose sum is σ = 1201062044. Its totient is φ = 343160580.

The previous prime is 686321143. The next prime is 686321171. The reversal of 686321164 is 461123686.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85790142 + ... + 85790149.

Almost surely, 2^686321164 is an apocalyptic number.

It is an amenable number.

686321164 is a deficient number, since it is larger than the sum of its proper divisors (514740880).

686321164 is a wasteful number, since it uses less digits than its factorization.

686321164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171580295 (or 171580293 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 686321164 is about 26197.7320392434. The cubic root of 686321164 is about 882.0823465433.

It can be divided in two parts, 68632 and 1164, that added together give a palindrome (69796).

The spelling of 686321164 in words is "six hundred eighty-six million, three hundred twenty-one thousand, one hundred sixty-four".