685854458586 has 96 divisors (see below), whose sum is σ = 1665351005760. Its totient is φ = 203912897760.

The previous prime is 685854458581. The next prime is 685854458603.

685854458586 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (685854458581) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 999705 + ... + 1539843.

It is an arithmetic number, because the mean of its divisors is an integer number (17347406310).

Almost surely, 2^685854458586 is an apocalyptic number.

685854458586 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 685854458586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832675502880).

685854458586 is an abundant number, since it is smaller than the sum of its proper divisors (979496547174).

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

685854458586 is a wasteful number, since it uses less digits than its factorization.

685854458586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540233 (or 540208 counting only the distinct ones).

The product of its digits is 1474560000, while the sum is 72.

The spelling of 685854458586 in words is "six hundred eighty-five billion, eight hundred fifty-four million, four hundred fifty-eight thousand, five hundred eighty-six".