6311168509 has 2 divisors, whose sum is σ = 6311168510. Its totient is φ = 6311168508.

The previous prime is 6311168431. The next prime is 6311168531. The reversal of 6311168509 is 9058611136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4249736100 + 2061432409 = 65190^2 + 45403^2 .

It is a cyclic number.

It is not a de Polignac number, because 6311168509 - 2¹¹ = 6311166461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6311169509) 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, 3155584254 + 3155584255.

It is an arithmetic number, because the mean of its divisors is an integer number (3155584255).

Almost surely, 2^6311168509 is an apocalyptic number.

It is an amenable number.

6311168509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6311168509 is an equidigital number, since it uses as much as digits as its factorization.

6311168509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 6311168509 is about 79442.8631722196. The cubic root of 6311168509 is about 1848.0054968392.

The spelling of 6311168509 in words is "six billion, three hundred eleven million, one hundred sixty-eight thousand, five hundred nine".