80804468729 has 2 divisors, whose sum is σ = 80804468730. Its totient is φ = 80804468728.

The previous prime is 80804468639. The next prime is 80804468743. The reversal of 80804468729 is 92786440808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57000607504 + 23803861225 = 238748^2 + 154285^2 .

It is a cyclic number.

It is not a de Polignac number, because 80804468729 - 2¹² = 80804464633 is a prime.

It is not a weakly prime, because it can be changed into another prime (80804468929) 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, 40402234364 + 40402234365.

It is an arithmetic number, because the mean of its divisors is an integer number (40402234365).

Almost surely, 2^80804468729 is an apocalyptic number.

It is an amenable number.

80804468729 is a deficient number, since it is larger than the sum of its proper divisors (1).

80804468729 is an equidigital number, since it uses as much as digits as its factorization.

80804468729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 80804468729 in words is "eighty billion, eight hundred four million, four hundred sixty-eight thousand, seven hundred twenty-nine".