686409099528 has 96 divisors (see below), whose sum is σ = 1813490566560. Its totient is φ = 216473852160.

The previous prime is 686409099461. The next prime is 686409099581. The reversal of 686409099528 is 825990904686.

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 23 ways as a sum of consecutive naturals, for example, 6541251 + ... + 6645357.

It is an arithmetic number, because the mean of its divisors is an integer number (18890526735).

Almost surely, 2^686409099528 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 686409099528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906745283280).

686409099528 is an abundant number, since it is smaller than the sum of its proper divisors (1127081467032).

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

686409099528 is a wasteful number, since it uses less digits than its factorization.

686409099528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104915 (or 104892 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 686409099528 in words is "six hundred eighty-six billion, four hundred nine million, ninety-nine thousand, five hundred twenty-eight".