16851868337 has 16 divisors (see below), whose sum is σ = 17478772752. Its totient is φ = 16234732800.

The previous prime is 16851868309. The next prime is 16851868349. The reversal of 16851868337 is 73386815861.

It can be written as a sum of positive squares in 8 ways, for example, as 6803610256 + 10048258081 = 82484^2 + 100241^2 .

It is a cyclic number.

It is not a de Polignac number, because 16851868337 - 2¹⁶ = 16851802801 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16851868387) 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 15 ways as a sum of consecutive naturals, for example, 1697087 + ... + 1706987.

It is an arithmetic number, because the mean of its divisors is an integer number (1092423297).

Almost surely, 2^16851868337 is an apocalyptic number.

It is an amenable number.

16851868337 is a deficient number, since it is larger than the sum of its proper divisors (626904415).

16851868337 is a wasteful number, since it uses less digits than its factorization.

16851868337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388.

The product of its digits is 5806080, while the sum is 56.

The spelling of 16851868337 in words is "sixteen billion, eight hundred fifty-one million, eight hundred sixty-eight thousand, three hundred thirty-seven".