16044779521 has 2 divisors, whose sum is σ = 16044779522. Its totient is φ = 16044779520.

The previous prime is 16044779497. The next prime is 16044779533. The reversal of 16044779521 is 12597744061.

16044779521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11316704400 + 4728075121 = 106380^2 + 68761^2 .

It is a cyclic number.

It is not a de Polignac number, because 16044779521 - 2¹¹ = 16044777473 is a prime.

It is not a weakly prime, because it can be changed into another prime (16044774521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022389760 + 8022389761.

It is an arithmetic number, because the mean of its divisors is an integer number (8022389761).

Almost surely, 2^16044779521 is an apocalyptic number.

It is an amenable number.

16044779521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16044779521 is an equidigital number, since it uses as much as digits as its factorization.

16044779521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 16044779521 in words is "sixteen billion, forty-four million, seven hundred seventy-nine thousand, five hundred twenty-one".