686289748368 has 240 divisors, whose sum is σ = 2172409736640. Its totient is φ = 185634892800.

The previous prime is 686289748327. The next prime is 686289748511. The reversal of 686289748368 is 863847982686.

It is a self number, because there is not a number n which added to its sum of digits gives 686289748368.

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 47 ways as a sum of consecutive naturals, for example, 77797398 + ... + 77806218.

It is an arithmetic number, because the mean of its divisors is an integer number (9051707236).

Almost surely, 2^686289748368 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 686289748368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086204868320).

686289748368 is an abundant number, since it is smaller than the sum of its proper divisors (1486119988272).

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

686289748368 is a wasteful number, since it uses less digits than its factorization.

686289748368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606 (or 10593 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 75.

The spelling of 686289748368 in words is "six hundred eighty-six billion, two hundred eighty-nine million, seven hundred forty-eight thousand, three hundred sixty-eight".