1685319911 has 8 divisors (see below), whose sum is σ = 1839938448. Its totient is φ = 1530936000.

The previous prime is 1685319901. The next prime is 1685319947. The reversal of 1685319911 is 1199135861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1685319911 - 2¹⁸ = 1685057767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685319901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43460 + ... + 72521.

It is an arithmetic number, because the mean of its divisors is an integer number (229992306).

Almost surely, 2^1685319911 is an apocalyptic number.

1685319911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1685319911 is a deficient number, since it is larger than the sum of its proper divisors (154618537).

1685319911 is a wasteful number, since it uses less digits than its factorization.

1685319911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117313.

The product of its digits is 58320, while the sum is 44.

The square root of 1685319911 is about 41052.6480388294. The cubic root of 1685319911 is about 1190.0378753569.

The spelling of 1685319911 in words is "one billion, six hundred eighty-five million, three hundred nineteen thousand, nine hundred eleven".