5440236509 has 2 divisors, whose sum is σ = 5440236510. Its totient is φ = 5440236508.

The previous prime is 5440236449. The next prime is 5440236533. The reversal of 5440236509 is 9056320445.

5440236509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3458028025 + 1982208484 = 58805^2 + 44522^2 .

It is a cyclic number.

It is not a de Polignac number, because 5440236509 - 2¹⁶ = 5440170973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5440236539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2720118254 + 2720118255.

It is an arithmetic number, because the mean of its divisors is an integer number (2720118255).

Almost surely, 2^5440236509 is an apocalyptic number.

It is an amenable number.

5440236509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5440236509 is an equidigital number, since it uses as much as digits as its factorization.

5440236509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 5440236509 is about 73757.9589535936. The cubic root of 5440236509 is about 1758.7573559887.

The spelling of 5440236509 in words is "five billion, four hundred forty million, two hundred thirty-six thousand, five hundred nine".