686324884896 has 432 divisors, whose sum is σ = 2375840533248. Its totient is φ = 187158988800.

The previous prime is 686324884879. The next prime is 686324884919. The reversal of 686324884896 is 698488423686.

It is a happy number.

686324884896 is a `hidden beast` number, since 6 + 8 + 63 + 2 + 4 + 88 + 489 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 31924711 + ... + 31946201.

It is an arithmetic number, because the mean of its divisors is an integer number (5499630864).

Almost surely, 2^686324884896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686324884896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187920266624).

686324884896 is an abundant number, since it is smaller than the sum of its proper divisors (1689515648352).

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

686324884896 is a wasteful number, since it uses less digits than its factorization.

686324884896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21625 (or 21607 counting only the distinct ones).

The product of its digits is 764411904, while the sum is 72.

The spelling of 686324884896 in words is "six hundred eighty-six billion, three hundred twenty-four million, eight hundred eighty-four thousand, eight hundred ninety-six".