16855204853 has 4 divisors (see below), whose sum is σ = 17012730240. Its totient is φ = 16697679468.

The previous prime is 16855204843. The next prime is 16855204859. The reversal of 16855204853 is 35840255861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35840255861 = 27337 ⋅1311053.

It is a cyclic number.

It is not a de Polignac number, because 16855204853 - 2³⁰ = 15781463029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16855204798 and 16855204807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855204859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78762533 + ... + 78762746.

It is an arithmetic number, because the mean of its divisors is an integer number (4253182560).

Almost surely, 2^16855204853 is an apocalyptic number.

It is an amenable number.

16855204853 is a deficient number, since it is larger than the sum of its proper divisors (157525387).

16855204853 is a wasteful number, since it uses less digits than its factorization.

16855204853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157525386.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 16855204853 in words is "sixteen billion, eight hundred fifty-five million, two hundred four thousand, eight hundred fifty-three".