686734868696 has 8 divisors (see below), whose sum is σ = 1287627878820. Its totient is φ = 343367434344.

The previous prime is 686734868693. The next prime is 686734868711. The reversal of 686734868696 is 696868437686.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686734868693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42920929286 + ... + 42920929301.

Almost surely, 2^686734868696 is an apocalyptic number.

It is an amenable number.

686734868696 is a deficient number, since it is larger than the sum of its proper divisors (600893010124).

686734868696 is a wasteful number, since it uses less digits than its factorization.

686734868696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85841858593 (or 85841858589 counting only the distinct ones).

The product of its digits is 3009871872, while the sum is 77.

The spelling of 686734868696 in words is "six hundred eighty-six billion, seven hundred thirty-four million, eight hundred sixty-eight thousand, six hundred ninety-six".