13440543243123 has 16 divisors (see below), whose sum is σ = 18029820001536. Its totient is φ = 8905824954720.

The previous prime is 13440543243053. The next prime is 13440543243137. The reversal of 13440543243123 is 32134234504431.

It is not a de Polignac number, because 13440543243123 - 2¹⁸ = 13440542980979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13440543243163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3752868 + ... + 6400398.

It is an arithmetic number, because the mean of its divisors is an integer number (1126863750096).

Almost surely, 2^{13440543243123} is an apocalyptic number.

13440543243123 is a deficient number, since it is larger than the sum of its proper divisors (4589276758413).

13440543243123 is a wasteful number, since it uses less digits than its factorization.

13440543243123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657834.

The product of its (nonzero) digits is 414720, while the sum is 39.

Adding to 13440543243123 its reverse (32134234504431), we get a palindrome (45574777747554).

The spelling of 13440543243123 in words is "thirteen trillion, four hundred forty billion, five hundred forty-three million, two hundred forty-three thousand, one hundred twenty-three".