16685853219 has 24 divisors (see below), whose sum is σ = 28994634240. Its totient is φ = 9032942448.

The previous prime is 16685853211. The next prime is 16685853227. The reversal of 16685853219 is 91235858661.

16685853219 is a `hidden beast` number, since 16 + 6 + 8 + 585 + 32 + 19 = 666.

It is an interprime number because it is at equal distance from previous prime (16685853211) and next prime (16685853227).

It is not a de Polignac number, because 16685853219 - 2³ = 16685853211 is a prime.

It is a super-2 number, since 2×16685853219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16685853211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6968667 + ... + 6971060.

It is an arithmetic number, because the mean of its divisors is an integer number (1208109760).

Almost surely, 2^16685853219 is an apocalyptic number.

16685853219 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16685853219 is a deficient number, since it is larger than the sum of its proper divisors (12308781021).

16685853219 is a wasteful number, since it uses less digits than its factorization.

16685853219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939759 (or 13939756 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 16685853219 in words is "sixteen billion, six hundred eighty-five million, eight hundred fifty-three thousand, two hundred nineteen".