686585470144 has 56 divisors (see below), whose sum is σ = 1639029244160. Its totient is φ = 278764022016.

The previous prime is 686585470111. The next prime is 686585470187. The reversal of 686585470144 is 441074585686.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40321932 + ... + 40338955.

It is an arithmetic number, because the mean of its divisors is an integer number (29268379360).

Almost surely, 2^686585470144 is an apocalyptic number.

686585470144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

686585470144 is an abundant number, since it is smaller than the sum of its proper divisors (952443774016).

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

686585470144 is a wasteful number, since it uses less digits than its factorization.

686585470144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80660925 (or 80660915 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 58.

The spelling of 686585470144 in words is "six hundred eighty-six billion, five hundred eighty-five million, four hundred seventy thousand, one hundred forty-four".