1685043685 has 16 divisors (see below), whose sum is σ = 2183690880. Its totient is φ = 1240856640.

The previous prime is 1685043667. The next prime is 1685043691. The reversal of 1685043685 is 5863405861.

It is not a de Polignac number, because 1685043685 - 2⁵ = 1685043653 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12771 + ... + 59440.

It is an arithmetic number, because the mean of its divisors is an integer number (136480680).

Almost surely, 2^1685043685 is an apocalyptic number.

It is an amenable number.

1685043685 is a deficient number, since it is larger than the sum of its proper divisors (498647195).

1685043685 is a wasteful number, since it uses less digits than its factorization.

1685043685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72588.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 1685043685 is about 41049.2836112885. The cubic root of 1685043685 is about 1189.9728555821.

The spelling of 1685043685 in words is "one billion, six hundred eighty-five million, forty-three thousand, six hundred eighty-five".