13123343105523 has 64 divisors (see below), whose sum is σ = 22250009088000. Its totient is φ = 7488732569472.

The previous prime is 13123343105507. The next prime is 13123343105527. The reversal of 13123343105523 is 32550134332131.

13123343105523 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 334 + 310 + 5 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 13123343105523 - 2⁴ = 13123343105507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13123343105527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1072250038 + ... + 1072262276.

It is an arithmetic number, because the mean of its divisors is an integer number (347656392000).

Almost surely, 2^{13123343105523} is an apocalyptic number.

13123343105523 is a deficient number, since it is larger than the sum of its proper divisors (9126665982477).

13123343105523 is a wasteful number, since it uses less digits than its factorization.

13123343105523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19601 (or 19595 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 13123343105523 its reverse (32550134332131), we get a palindrome (45673477437654).

The spelling of 13123343105523 in words is "thirteen trillion, one hundred twenty-three billion, three hundred forty-three million, one hundred five thousand, five hundred twenty-three".