80005120009 has 2 divisors, whose sum is σ = 80005120010. Its totient is φ = 80005120008.

The previous prime is 80005119979. The next prime is 80005120057. The reversal of 80005120009 is 90002150008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70469011600 + 9536108409 = 265460^2 + 97653^2 .

It is a cyclic number.

It is not a de Polignac number, because 80005120009 - 2⁵ = 80005119977 is a prime.

It is not a weakly prime, because it can be changed into another prime (80005120309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40002560004 + 40002560005.

It is an arithmetic number, because the mean of its divisors is an integer number (40002560005).

Almost surely, 2^80005120009 is an apocalyptic number.

It is an amenable number.

80005120009 is a deficient number, since it is larger than the sum of its proper divisors (1).

80005120009 is an equidigital number, since it uses as much as digits as its factorization.

80005120009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 80005120009 in words is "eighty billion, five million, one hundred twenty thousand, nine".