16851870049 has 16 divisors (see below), whose sum is σ = 19346439168. Its totient is φ = 14379231312.

The previous prime is 16851870037. The next prime is 16851870071. The reversal of 16851870049 is 94007815861.

16851870049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16851870049 - 2⁵ = 16851870017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16851869984 and 16851870011.

It is not an unprimeable number, because it can be changed into a prime (16851870019) 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 15 ways as a sum of consecutive naturals, for example, 1566202 + ... + 1576924.

It is an arithmetic number, because the mean of its divisors is an integer number (1209152448).

Almost surely, 2^16851870049 is an apocalyptic number.

It is an amenable number.

16851870049 is a deficient number, since it is larger than the sum of its proper divisors (2494569119).

16851870049 is a wasteful number, since it uses less digits than its factorization.

16851870049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11724.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 16851870049 in words is "sixteen billion, eight hundred fifty-one million, eight hundred seventy thousand, forty-nine".