16211810869 has 4 divisors (see below), whose sum is σ = 16770838860. Its totient is φ = 15652782880.

The previous prime is 16211810831. The next prime is 16211810911. The reversal of 16211810869 is 96801811261.

16211810869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13662570769 + 2549240100 = 116887^2 + 50490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16211810869 is a prime.

It is a super-2 number, since 2×16211810869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16211810269) 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 3 ways as a sum of consecutive naturals, for example, 279513952 + ... + 279514009.

It is an arithmetic number, because the mean of its divisors is an integer number (4192709715).

Almost surely, 2^16211810869 is an apocalyptic number.

It is an amenable number.

16211810869 is a deficient number, since it is larger than the sum of its proper divisors (559027991).

16211810869 is an equidigital number, since it uses as much as digits as its factorization.

16211810869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559027990.

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 16211810869 in words is "sixteen billion, two hundred eleven million, eight hundred ten thousand, eight hundred sixty-nine".