16439544019 has 2 divisors, whose sum is σ = 16439544020. Its totient is φ = 16439544018.

The previous prime is 16439543999. The next prime is 16439544031. The reversal of 16439544019 is 91044593461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16439544019 - 2⁷ = 16439543891 is a prime.

It is a super-2 number, since 2×16439544019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16439544019.

It is not a weakly prime, because it can be changed into another prime (16439545019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8219772009 + 8219772010.

It is an arithmetic number, because the mean of its divisors is an integer number (8219772010).

Almost surely, 2^16439544019 is an apocalyptic number.

16439544019 is a deficient number, since it is larger than the sum of its proper divisors (1).

16439544019 is an equidigital number, since it uses as much as digits as its factorization.

16439544019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 16439544019 in words is "sixteen billion, four hundred thirty-nine million, five hundred forty-four thousand, nineteen".