686078823344 has 10 divisors (see below), whose sum is σ = 1329277720260. Its totient is φ = 343039411664.

The previous prime is 686078823343. The next prime is 686078823407. The reversal of 686078823344 is 443328870686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (686078823343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439963214 + ... + 21439963245.

It is an arithmetic number, because the mean of its divisors is an integer number (132927772026).

Almost surely, 2^686078823344 is an apocalyptic number.

It is an amenable number.

686078823344 is a deficient number, since it is larger than the sum of its proper divisors (643198896916).

686078823344 is a wasteful number, since it uses less digits than its factorization.

686078823344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42879926467 (or 42879926461 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 59.

The spelling of 686078823344 in words is "six hundred eighty-six billion, seventy-eight million, eight hundred twenty-three thousand, three hundred forty-four".