12556117424 has 10 divisors (see below), whose sum is σ = 24327477540. Its totient is φ = 6278058704.

The previous prime is 12556117423. The next prime is 12556117429. The reversal of 12556117424 is 42471165521.

12556117424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12556117421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392378654 + ... + 392378685.

It is an arithmetic number, because the mean of its divisors is an integer number (2432747754).

Almost surely, 2^12556117424 is an apocalyptic number.

It is an amenable number.

12556117424 is a deficient number, since it is larger than the sum of its proper divisors (11771360116).

12556117424 is an equidigital number, since it uses as much as digits as its factorization.

12556117424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784757347 (or 784757341 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The spelling of 12556117424 in words is "twelve billion, five hundred fifty-six million, one hundred seventeen thousand, four hundred twenty-four".