80844443969 has 2 divisors, whose sum is σ = 80844443970. Its totient is φ = 80844443968.

The previous prime is 80844443909. The next prime is 80844444029. The reversal of 80844443969 is 96934444808.

It is a balanced prime because it is at equal distance from previous prime (80844443909) and next prime (80844444029).

It can be written as a sum of positive squares in only one way, i.e., 78239362369 + 2605081600 = 279713^2 + 51040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80844443969 is a prime.

It is a super-2 number, since 2×80844443969² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80844443909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40422221984 + 40422221985.

It is an arithmetic number, because the mean of its divisors is an integer number (40422221985).

Almost surely, 2^80844443969 is an apocalyptic number.

It is an amenable number.

80844443969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80844443969 is an equidigital number, since it uses as much as digits as its factorization.

80844443969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23887872, while the sum is 59.

The spelling of 80844443969 in words is "eighty billion, eight hundred forty-four million, four hundred forty-three thousand, nine hundred sixty-nine".