1685005203993 has 16 divisors (see below), whose sum is σ = 2312211694080. Its totient is φ = 1090694526336.

The previous prime is 1685005203979. The next prime is 1685005203997. The reversal of 1685005203993 is 3993025005861.

It is not a de Polignac number, because 1685005203993 - 2⁹ = 1685005203481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1685005203997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15792580 + ... + 15898917.

It is an arithmetic number, because the mean of its divisors is an integer number (144513230880).

Almost surely, 2^{1685005203993} is an apocalyptic number.

It is an amenable number.

1685005203993 is a deficient number, since it is larger than the sum of its proper divisors (627206490087).

1685005203993 is a wasteful number, since it uses less digits than its factorization.

1685005203993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31692016.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 1685005203993 in words is "one trillion, six hundred eighty-five billion, five million, two hundred three thousand, nine hundred ninety-three".