1685005211823 has 8 divisors (see below), whose sum is σ = 2319146958336. Its totient is φ = 1087100136600.

The previous prime is 1685005211753. The next prime is 1685005211843. The reversal of 1685005211823 is 3281125005861.

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

It is not a de Polignac number, because 1685005211823 - 2²¹ = 1685003114671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685005211843) 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 7 ways as a sum of consecutive naturals, for example, 9059167713 + ... + 9059167898.

It is an arithmetic number, because the mean of its divisors is an integer number (289893369792).

Almost surely, 2^{1685005211823} is an apocalyptic number.

1685005211823 is a deficient number, since it is larger than the sum of its proper divisors (634141746513).

1685005211823 is a wasteful number, since it uses less digits than its factorization.

1685005211823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18118335645.

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 1685005211823 in words is "one trillion, six hundred eighty-five billion, five million, two hundred eleven thousand, eight hundred twenty-three".