12523656523 has 12 divisors (see below), whose sum is σ = 15335090760. Its totient is φ = 10169584992.

The previous prime is 12523656521. The next prime is 12523656527. The reversal of 12523656523 is 32565632521.

It is not a de Polignac number, because 12523656523 - 2¹ = 12523656521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12523656521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6724986 + ... + 6726847.

It is an arithmetic number, because the mean of its divisors is an integer number (1277924230).

Almost surely, 2^12523656523 is an apocalyptic number.

12523656523 is a deficient number, since it is larger than the sum of its proper divisors (2811434237).

12523656523 is a wasteful number, since it uses less digits than its factorization.

12523656523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451866 (or 13451859 counting only the distinct ones).

The product of its digits is 324000, while the sum is 40.

The spelling of 12523656523 in words is "twelve billion, five hundred twenty-three million, six hundred fifty-six thousand, five hundred twenty-three".