16721113867 has 8 divisors (see below), whose sum is σ = 16909396560. Its totient is φ = 16533538560.

The previous prime is 16721113819. The next prime is 16721113879. The reversal of 16721113867 is 76831112761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16721113867 - 2¹⁹ = 16720589579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16721113067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129234 + ... + 223927.

It is an arithmetic number, because the mean of its divisors is an integer number (2113674570).

Almost surely, 2^16721113867 is an apocalyptic number.

16721113867 is a deficient number, since it is larger than the sum of its proper divisors (188282693).

16721113867 is a wasteful number, since it uses less digits than its factorization.

16721113867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353693.

The product of its digits is 84672, while the sum is 43.

The spelling of 16721113867 in words is "sixteen billion, seven hundred twenty-one million, one hundred thirteen thousand, eight hundred sixty-seven".