686229864508 has 12 divisors (see below), whose sum is σ = 1200935664040. Its totient is φ = 343105389072.

The previous prime is 686229864493. The next prime is 686229864511. The reversal of 686229864508 is 805468922686.

It is a super-2 number, since 2×686229864508² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686229864508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222766 + ... + 2512597.

Almost surely, 2^686229864508 is an apocalyptic number.

It is an amenable number.

686229864508 is a deficient number, since it is larger than the sum of its proper divisors (514705799532).

686229864508 is a wasteful number, since it uses less digits than its factorization.

686229864508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771596 (or 4771594 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 64.

The spelling of 686229864508 in words is "six hundred eighty-six billion, two hundred twenty-nine million, eight hundred sixty-four thousand, five hundred eight".