1685166851836 has 12 divisors (see below), whose sum is σ = 3175891374712. Its totient is φ = 777769316208.

The previous prime is 1685166851833. The next prime is 1685166851873. The reversal of 1685166851836 is 6381586615861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685166851831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16203527370 + ... + 16203527473.

Almost surely, 2^{1685166851836} is an apocalyptic number.

It is an amenable number.

1685166851836 is a deficient number, since it is larger than the sum of its proper divisors (1490724522876).

1685166851836 is a wasteful number, since it uses less digits than its factorization.

1685166851836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32407054860 (or 32407054858 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 64.

The spelling of 1685166851836 in words is "one trillion, six hundred eighty-five billion, one hundred sixty-six million, eight hundred fifty-one thousand, eight hundred thirty-six".