1685005204044 has 36 divisors (see below), whose sum is σ = 4110053666936. Its totient is φ = 537248034048.

The previous prime is 1685005204039. The next prime is 1685005204079. The reversal of 1685005204044 is 4404025005861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1685005203993 and 1685005204011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132713029 + ... + 132725724.

Almost surely, 2^{1685005204044} is an apocalyptic number.

It is an amenable number.

1685005204044 is an abundant number, since it is smaller than the sum of its proper divisors (2425048462892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1685005204044 is a wasteful number, since it uses less digits than its factorization.

1685005204044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265438806 (or 265438781 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The spelling of 1685005204044 in words is "one trillion, six hundred eighty-five billion, five million, two hundred four thousand, forty-four".