685737737585 has 16 divisors (see below), whose sum is σ = 831763924992. Its totient is φ = 542702836800.

The previous prime is 685737737567. The next prime is 685737737591. The reversal of 685737737585 is 585737737586.

It is not a de Polignac number, because 685737737585 - 2¹⁶ = 685737672049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810709 + ... + 2156418.

It is an arithmetic number, because the mean of its divisors is an integer number (51985245312).

Almost surely, 2^685737737585 is an apocalyptic number.

It is an amenable number.

685737737585 is a deficient number, since it is larger than the sum of its proper divisors (146026187407).

685737737585 is a wasteful number, since it uses less digits than its factorization.

685737737585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967504.

The product of its digits is 1037232000, while the sum is 71.

Subtracting from 685737737585 its reverse (585737737586), we obtain a palindrome (99999999999).

The spelling of 685737737585 in words is "six hundred eighty-five billion, seven hundred thirty-seven million, seven hundred thirty-seven thousand, five hundred eighty-five".