13545011449 has 2 divisors, whose sum is σ = 13545011450. Its totient is φ = 13545011448.

The previous prime is 13545011423. The next prime is 13545011497. The reversal of 13545011449 is 94411054531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10280946025 + 3264065424 = 101395^2 + 57132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13545011449 is a prime.

It is not a weakly prime, because it can be changed into another prime (13545011149) 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, 6772505724 + 6772505725.

It is an arithmetic number, because the mean of its divisors is an integer number (6772505725).

Almost surely, 2^13545011449 is an apocalyptic number.

It is an amenable number.

13545011449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13545011449 is an equidigital number, since it uses as much as digits as its factorization.

13545011449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 13545011449 in words is "thirteen billion, five hundred forty-five million, eleven thousand, four hundred forty-nine".