686802595648 has 112 divisors (see below), whose sum is σ = 1500703916544. Its totient is φ = 309876019200.

The previous prime is 686802595643. The next prime is 686802595649. The reversal of 686802595648 is 846595208686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686802595643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34675348 + ... + 34695148.

It is an arithmetic number, because the mean of its divisors is an integer number (13399142112).

Almost surely, 2^686802595648 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 686802595648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750351958272).

686802595648 is an abundant number, since it is smaller than the sum of its proper divisors (813901320896).

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

686802595648 is a wasteful number, since it uses less digits than its factorization.

686802595648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20760 (or 20750 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 67.

The spelling of 686802595648 in words is "six hundred eighty-six billion, eight hundred two million, five hundred ninety-five thousand, six hundred forty-eight".