1685168516685 has 32 divisors (see below), whose sum is σ = 2855169533952. Its totient is φ = 845800862720.

The previous prime is 1685168516657. The next prime is 1685168516749. The reversal of 1685168516685 is 5866158615861.

It is not a de Polignac number, because 1685168516685 - 2⁵ = 1685168516653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2159227 + ... + 2834183.

It is an arithmetic number, because the mean of its divisors is an integer number (89224047936).

Almost surely, 2^{1685168516685} is an apocalyptic number.

1685168516685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1685168516685 is a deficient number, since it is larger than the sum of its proper divisors (1170001017267).

1685168516685 is a wasteful number, since it uses less digits than its factorization.

1685168516685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684773.

The product of its digits is 82944000, while the sum is 66.

The spelling of 1685168516685 in words is "one trillion, six hundred eighty-five billion, one hundred sixty-eight million, five hundred sixteen thousand, six hundred eighty-five".