685826648847 has 12 divisors (see below), whose sum is σ = 1042777361080. Its totient is φ = 433153672848.

The previous prime is 685826648803. The next prime is 685826648909. The reversal of 685826648847 is 748846628586.

685826648847 is a `hidden beast` number, since 6 + 8 + 5 + 82 + 66 + 488 + 4 + 7 = 666.

It is not a de Polignac number, because 685826648847 - 2⁶ = 685826648783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685826648047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2005340908 + ... + 2005341249.

Almost surely, 2^685826648847 is an apocalyptic number.

685826648847 is a deficient number, since it is larger than the sum of its proper divisors (356950712233).

685826648847 is a wasteful number, since it uses less digits than its factorization.

685826648847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010682182 (or 4010682179 counting only the distinct ones).

The product of its digits is 990904320, while the sum is 72.

The spelling of 685826648847 in words is "six hundred eighty-five billion, eight hundred twenty-six million, six hundred forty-eight thousand, eight hundred forty-seven".