16304943344891 has 4 divisors (see below), whose sum is σ = 17163098257800. Its totient is φ = 15446788431984.

The previous prime is 16304943344887. The next prime is 16304943344927. The reversal of 16304943344891 is 19844334940361.

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

It is a cyclic number.

It is not a de Polignac number, because 16304943344891 - 2² = 16304943344887 is a prime.

It is a super-2 number, since 2×16304943344891² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16304943344891.

It is not an unprimeable number, because it can be changed into a prime (16304943344801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429077456426 + ... + 429077456463.

It is an arithmetic number, because the mean of its divisors is an integer number (4290774564450).

Almost surely, 2^{16304943344891} is an apocalyptic number.

16304943344891 is a deficient number, since it is larger than the sum of its proper divisors (858154912909).

16304943344891 is an equidigital number, since it uses as much as digits as its factorization.

16304943344891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858154912908.

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 16304943344891 in words is "sixteen trillion, three hundred four billion, nine hundred forty-three million, three hundred forty-four thousand, eight hundred ninety-one".