686409099580 has 12 divisors (see below), whose sum is σ = 1441459109160. Its totient is φ = 274563639824.

The previous prime is 686409099461. The next prime is 686409099581. The reversal of 686409099580 is 85990904686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686409099581) 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, 17160227470 + ... + 17160227509.

It is an arithmetic number, because the mean of its divisors is an integer number (120121592430).

Almost surely, 2^686409099580 is an apocalyptic number.

It is an amenable number.

686409099580 is an abundant number, since it is smaller than the sum of its proper divisors (755050009580).

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

686409099580 is a wasteful number, since it uses less digits than its factorization.

686409099580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34320454988 (or 34320454986 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 686409099580 in words is "six hundred eighty-six billion, four hundred nine million, ninety-nine thousand, five hundred eighty".