16437641729 has 2 divisors, whose sum is σ = 16437641730. Its totient is φ = 16437641728.

The previous prime is 16437641669. The next prime is 16437641761. The reversal of 16437641729 is 92714673461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14419206400 + 2018435329 = 120080^2 + 44927^2 .

It is a cyclic number.

It is not a de Polignac number, because 16437641729 - 2¹⁶ = 16437576193 is a prime.

It is a super-2 number, since 2×16437641729² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16437641329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8218820864 + 8218820865.

It is an arithmetic number, because the mean of its divisors is an integer number (8218820865).

Almost surely, 2^16437641729 is an apocalyptic number.

It is an amenable number.

16437641729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16437641729 is an equidigital number, since it uses as much as digits as its factorization.

16437641729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The spelling of 16437641729 in words is "sixteen billion, four hundred thirty-seven million, six hundred forty-one thousand, seven hundred twenty-nine".