686081912 has 8 divisors (see below), whose sum is σ = 1286403600. Its totient is φ = 343040952.

The previous prime is 686081897. The next prime is 686081923. The reversal of 686081912 is 219180686.

686081912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 686081912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42880112 + ... + 42880127.

It is an arithmetic number, because the mean of its divisors is an integer number (160800450).

Almost surely, 2^686081912 is an apocalyptic number.

It is an amenable number.

686081912 is a deficient number, since it is larger than the sum of its proper divisors (600321688).

686081912 is a wasteful number, since it uses less digits than its factorization.

686081912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85760245 (or 85760241 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 686081912 is about 26193.1653680879. The cubic root of 686081912 is about 881.9798364726.

The spelling of 686081912 in words is "six hundred eighty-six million, eighty-one thousand, nine hundred twelve".