686044440686 has 12 divisors (see below), whose sum is σ = 1131122859216. Its totient is φ = 311838382020.

The previous prime is 686044440673. The next prime is 686044440691.

686044440686 is nontrivially palindromic in base 10.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1417446950 + ... + 1417447433.

It is an arithmetic number, because the mean of its divisors is an integer number (94260238268).

Almost surely, 2^686044440686 is an apocalyptic number.

686044440686 is a deficient number, since it is larger than the sum of its proper divisors (445078418530).

686044440686 is a wasteful number, since it uses less digits than its factorization.

686044440686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834894407 (or 2834894396 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 56.

The spelling of 686044440686 in words is "six hundred eighty-six billion, forty-four million, four hundred forty thousand, six hundred eighty-six".