311147438965009 has 2 divisors, whose sum is σ = 311147438965010. Its totient is φ = 311147438965008.

The previous prime is 311147438964977. The next prime is 311147438965081. The reversal of 311147438965009 is 900569834741113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309964721814225 + 1182717150784 = 17605815^2 + 1087528^2 .

It is an emirp because it is prime and its reverse (900569834741113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311147438965009 - 2⁵ = 311147438964977 is a prime.

It is not a weakly prime, because it can be changed into another prime (311147438965309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155573719482504 + 155573719482505.

It is an arithmetic number, because the mean of its divisors is an integer number (155573719482505).

Almost surely, 2^{311147438965009} is an apocalyptic number.

It is an amenable number.

311147438965009 is a deficient number, since it is larger than the sum of its proper divisors (1).

311147438965009 is an equidigital number, since it uses as much as digits as its factorization.

311147438965009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 311147438965009 in words is "three hundred eleven trillion, one hundred forty-seven billion, four hundred thirty-eight million, nine hundred sixty-five thousand, nine".