13145123543 has 2 divisors, whose sum is σ = 13145123544. Its totient is φ = 13145123542.

The previous prime is 13145123539. The next prime is 13145123587. The reversal of 13145123543 is 34532154131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13145123543 - 2² = 13145123539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13145173543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6572561771 + 6572561772.

It is an arithmetic number, because the mean of its divisors is an integer number (6572561772).

Almost surely, 2^13145123543 is an apocalyptic number.

13145123543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13145123543 is an equidigital number, since it uses as much as digits as its factorization.

13145123543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

Adding to 13145123543 its reverse (34532154131), we get a palindrome (47677277674).

The spelling of 13145123543 in words is "thirteen billion, one hundred forty-five million, one hundred twenty-three thousand, five hundred forty-three".