80444460209 has 2 divisors, whose sum is σ = 80444460210. Its totient is φ = 80444460208.

The previous prime is 80444460199. The next prime is 80444460227. The reversal of 80444460209 is 90206444408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40684100209 + 39760360000 = 201703^2 + 199400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80444460209 is a prime.

It is a super-2 number, since 2×80444460209² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80444460289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40222230104 + 40222230105.

It is an arithmetic number, because the mean of its divisors is an integer number (40222230105).

Almost surely, 2^80444460209 is an apocalyptic number.

It is an amenable number.

80444460209 is a deficient number, since it is larger than the sum of its proper divisors (1).

80444460209 is an equidigital number, since it uses as much as digits as its factorization.

80444460209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 80444460209 in words is "eighty billion, four hundred forty-four million, four hundred sixty thousand, two hundred nine".