13544748509 has 2 divisors, whose sum is σ = 13544748510. Its totient is φ = 13544748508.

The previous prime is 13544748499. The next prime is 13544748559. The reversal of 13544748509 is 90584744531.

It is a happy number.

It is an a-pointer prime, because the next prime (13544748559) can be obtained adding 13544748509 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13379548900 + 165199609 = 115670^2 + 12853^2 .

It is a cyclic number.

It is not a de Polignac number, because 13544748509 - 2¹⁶ = 13544682973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13544748559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6772374254 + 6772374255.

It is an arithmetic number, because the mean of its divisors is an integer number (6772374255).

Almost surely, 2^13544748509 is an apocalyptic number.

It is an amenable number.

13544748509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13544748509 is an equidigital number, since it uses as much as digits as its factorization.

13544748509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 13544748509 in words is "thirteen billion, five hundred forty-four million, seven hundred forty-eight thousand, five hundred nine".