12724742356 has 6 divisors (see below), whose sum is σ = 22268299130. Its totient is φ = 6362371176.

The previous prime is 12724742321. The next prime is 12724742357. The reversal of 12724742356 is 65324742721.

12724742356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12291269956 + 433472400 = 110866^2 + 20820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12724742357) 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, 1590592791 + ... + 1590592798.

Almost surely, 2^12724742356 is an apocalyptic number.

It is an amenable number.

12724742356 is a deficient number, since it is larger than the sum of its proper divisors (9543556774).

12724742356 is a wasteful number, since it uses less digits than its factorization.

12724742356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181185593 (or 3181185591 counting only the distinct ones).

The product of its digits is 564480, while the sum is 43.

The spelling of 12724742356 in words is "twelve billion, seven hundred twenty-four million, seven hundred forty-two thousand, three hundred fifty-six".