685545545586 has 96 divisors (see below), whose sum is σ = 1539894343680. Its totient is φ = 203220408160.

The previous prime is 685545545569. The next prime is 685545545647.

685545545586 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96186355 + ... + 96193481.

It is an arithmetic number, because the mean of its divisors is an integer number (16040566080).

Almost surely, 2^685545545586 is an apocalyptic number.

685545545586 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 685545545586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769947171840).

685545545586 is an abundant number, since it is smaller than the sum of its proper divisors (854348798094).

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

685545545586 is a wasteful number, since it uses less digits than its factorization.

685545545586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10020 (or 10009 counting only the distinct ones).

The product of its digits is 576000000, while the sum is 66.

The spelling of 685545545586 in words is "six hundred eighty-five billion, five hundred forty-five million, five hundred forty-five thousand, five hundred eighty-six".