686526316388 has 24 divisors (see below), whose sum is σ = 1387737689184. Its totient is φ = 293701097600.

The previous prime is 686526316373. The next prime is 686526316393. The reversal of 686526316388 is 883613625686.

It is a self number, because there is not a number n which added to its sum of digits gives 686526316388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458907218 + ... + 458908713.

It is an arithmetic number, because the mean of its divisors is an integer number (57822403716).

Almost surely, 2^686526316388 is an apocalyptic number.

686526316388 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

686526316388 is an abundant number, since it is smaller than the sum of its proper divisors (701211372796).

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

686526316388 is a wasteful number, since it uses less digits than its factorization.

686526316388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917815963 (or 917815961 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 62.

The spelling of 686526316388 in words is "six hundred eighty-six billion, five hundred twenty-six million, three hundred sixteen thousand, three hundred eighty-eight".