16855321149 has 12 divisors (see below), whose sum is σ = 24355122012. Its totient is φ = 11232936000.

The previous prime is 16855321051. The next prime is 16855321157. The reversal of 16855321149 is 94112355861.

It is a happy number.

16855321149 is a `hidden beast` number, since 1 + 68 + 5 + 532 + 11 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4127420025 + 12727901124 = 64245^2 + 112818^2 .

It is not a de Polignac number, because 16855321149 - 2¹⁵ = 16855288381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855321949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301552 + ... + 353049.

It is an arithmetic number, because the mean of its divisors is an integer number (2029593501).

Almost surely, 2^16855321149 is an apocalyptic number.

It is an amenable number.

16855321149 is a deficient number, since it is larger than the sum of its proper divisors (7499800863).

16855321149 is a wasteful number, since it uses less digits than its factorization.

16855321149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657468 (or 657465 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 16855321149 in words is "sixteen billion, eight hundred fifty-five million, three hundred twenty-one thousand, one hundred forty-nine".