686344834560 has 720 divisors, whose sum is σ = 2805704204688. Its totient is φ = 142607646720.

The previous prime is 686344834547. The next prime is 686344834579. The reversal of 686344834560 is 65438443686.

It is a self number, because there is not a number n which added to its sum of digits gives 686344834560.

It is a congruent number.

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, 45527184 + ... + 45542256.

Almost surely, 2^686344834560 is an apocalyptic number.

686344834560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686344834560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402852102344).

686344834560 is an abundant number, since it is smaller than the sum of its proper divisors (2119359370128).

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

686344834560 is a wasteful number, since it uses less digits than its factorization.

686344834560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15135 (or 15101 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 57.

The spelling of 686344834560 in words is "six hundred eighty-six billion, three hundred forty-four million, eight hundred thirty-four thousand, five hundred sixty".