80505086009 has 2 divisors, whose sum is σ = 80505086010. Its totient is φ = 80505086008.

The previous prime is 80505085993. The next prime is 80505086017. The reversal of 80505086009 is 90068050508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55945494784 + 24559591225 = 236528^2 + 156715^2 .

It is a cyclic number.

It is not a de Polignac number, because 80505086009 - 2⁴ = 80505085993 is a prime.

It is not a weakly prime, because it can be changed into another prime (80505086099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40252543004 + 40252543005.

It is an arithmetic number, because the mean of its divisors is an integer number (40252543005).

Almost surely, 2^80505086009 is an apocalyptic number.

It is an amenable number.

80505086009 is a deficient number, since it is larger than the sum of its proper divisors (1).

80505086009 is an equidigital number, since it uses as much as digits as its factorization.

80505086009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 80505086009 in words is "eighty billion, five hundred five million, eighty-six thousand, nine".