16044668149 has 2 divisors, whose sum is σ = 16044668150. Its totient is φ = 16044668148.

The previous prime is 16044668077. The next prime is 16044668261. The reversal of 16044668149 is 94186644061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14222232049 + 1822436100 = 119257^2 + 42690^2 .

It is a cyclic number.

It is not a de Polignac number, because 16044668149 - 2⁷ = 16044668021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16044662149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022334074 + 8022334075.

It is an arithmetic number, because the mean of its divisors is an integer number (8022334075).

Almost surely, 2^16044668149 is an apocalyptic number.

It is an amenable number.

16044668149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16044668149 is an equidigital number, since it uses as much as digits as its factorization.

16044668149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 16044668149 in words is "sixteen billion, forty-four million, six hundred sixty-eight thousand, one hundred forty-nine".