686268974120 has 16 divisors (see below), whose sum is σ = 1544105191860. Its totient is φ = 274507589632.

The previous prime is 686268974117. The next prime is 686268974137. The reversal of 686268974120 is 21479862686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 628084780324 + 58184193796 = 792518^2 + 241214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 686268974120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8578362137 + ... + 8578362216.

Almost surely, 2^686268974120 is an apocalyptic number.

It is an amenable number.

686268974120 is an abundant number, since it is smaller than the sum of its proper divisors (857836217740).

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

686268974120 is a wasteful number, since it uses less digits than its factorization.

686268974120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17156724364 (or 17156724360 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 686268974120 in words is "six hundred eighty-six billion, two hundred sixty-eight million, nine hundred seventy-four thousand, one hundred twenty".