13453533449 has 2 divisors, whose sum is σ = 13453533450. Its totient is φ = 13453533448.

The previous prime is 13453533439. The next prime is 13453533461. The reversal of 13453533449 is 94433535431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13446025849 + 7507600 = 115957^2 + 2740^2 .

It is an emirp because it is prime and its reverse (94433535431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13453533449 is a prime.

It is not a weakly prime, because it can be changed into another prime (13453533439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726766724 + 6726766725.

It is an arithmetic number, because the mean of its divisors is an integer number (6726766725).

Almost surely, 2^13453533449 is an apocalyptic number.

It is an amenable number.

13453533449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453533449 is an equidigital number, since it uses as much as digits as its factorization.

13453533449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 44.

The spelling of 13453533449 in words is "thirteen billion, four hundred fifty-three million, five hundred thirty-three thousand, four hundred forty-nine".