12736454517 has 12 divisors (see below), whose sum is σ = 18398165760. Its totient is φ = 8490478248.

The previous prime is 12736454513. The next prime is 12736454567. The reversal of 12736454517 is 71545463721.

12736454517 is a `hidden beast` number, since 1 + 2 + 73 + 64 + 5 + 4 + 517 = 666.

It is not a de Polignac number, because 12736454517 - 2² = 12736454513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12736454513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194334 + ... + 251472.

It is an arithmetic number, because the mean of its divisors is an integer number (1533180480).

Almost surely, 2^12736454517 is an apocalyptic number.

It is an amenable number.

12736454517 is a deficient number, since it is larger than the sum of its proper divisors (5661711243).

12736454517 is a wasteful number, since it uses less digits than its factorization.

12736454517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81912 (or 81909 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 12736454517 in words is "twelve billion, seven hundred thirty-six million, four hundred fifty-four thousand, five hundred seventeen".