16443345887 has 2 divisors, whose sum is σ = 16443345888. Its totient is φ = 16443345886.

The previous prime is 16443345851. The next prime is 16443345889. The reversal of 16443345887 is 78854334461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16443345887 is a prime.

It is a super-3 number, since 3×16443345887³ (a number of 32 digits) contains 333 as substring.

Together with 16443345889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16443345889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221672943 + 8221672944.

It is an arithmetic number, because the mean of its divisors is an integer number (8221672944).

Almost surely, 2^16443345887 is an apocalyptic number.

16443345887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16443345887 is an equidigital number, since it uses as much as digits as its factorization.

16443345887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 53.

The spelling of 16443345887 in words is "sixteen billion, four hundred forty-three million, three hundred forty-five thousand, eight hundred eighty-seven".