686746693164 has 192 divisors, whose sum is σ = 1898717184000. Its totient is φ = 193078267200.

The previous prime is 686746693153. The next prime is 686746693201. The reversal of 686746693164 is 461396647686.

It is a junction number, because it is equal to n+sod(n) for n = 686746693095 and 686746693104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101122609 + ... + 101129399.

It is an arithmetic number, because the mean of its divisors is an integer number (9889152000).

Almost surely, 2^686746693164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686746693164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949358592000).

686746693164 is an abundant number, since it is smaller than the sum of its proper divisors (1211970490836).

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

686746693164 is a wasteful number, since it uses less digits than its factorization.

686746693164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209 (or 7193 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 66.

The spelling of 686746693164 in words is "six hundred eighty-six billion, seven hundred forty-six million, six hundred ninety-three thousand, one hundred sixty-four".