686588208328 has 16 divisors (see below), whose sum is σ = 1404384971760. Its totient is φ = 312085549200.

The previous prime is 686588208323. The next prime is 686588208349. The reversal of 686588208328 is 823802885686.

It is a self number, because there is not a number n which added to its sum of digits gives 686588208328.

It is not an unprimeable number, because it can be changed into a prime (686588208323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3901069278 + ... + 3901069453.

It is an arithmetic number, because the mean of its divisors is an integer number (87774060735).

Almost surely, 2^686588208328 is an apocalyptic number.

It is an amenable number.

686588208328 is an abundant number, since it is smaller than the sum of its proper divisors (717796763432).

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

686588208328 is a wasteful number, since it uses less digits than its factorization.

686588208328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7802138748 (or 7802138744 counting only the distinct ones).

The product of its (nonzero) digits is 70778880, while the sum is 64.

It can be divided in two parts, 686588 and 208328, that added together give a square (894916 = 946²).

The spelling of 686588208328 in words is "six hundred eighty-six billion, five hundred eighty-eight million, two hundred eight thousand, three hundred twenty-eight".