13453440509 has 2 divisors, whose sum is σ = 13453440510. Its totient is φ = 13453440508.

The previous prime is 13453440491. The next prime is 13453440521. The reversal of 13453440509 is 90504435431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13450896484 + 2544025 = 115978^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 13453440509 - 2³² = 9158473213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13453490509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726720254 + 6726720255.

It is an arithmetic number, because the mean of its divisors is an integer number (6726720255).

Almost surely, 2^13453440509 is an apocalyptic number.

It is an amenable number.

13453440509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453440509 is an equidigital number, since it uses as much as digits as its factorization.

13453440509 is an evil number, because the sum of its binary digits is even.

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

The spelling of 13453440509 in words is "thirteen billion, four hundred fifty-three million, four hundred forty thousand, five hundred nine".