12728363637568 has 28 divisors (see below), whose sum is σ = 25259478835780. Its totient is φ = 6363770545152.

The previous prime is 12728363637511. The next prime is 12728363637569. The reversal of 12728363637568 is 86573636382721.

It can be written as a sum of positive squares in 2 ways, for example, as 3012973867264 + 9715389770304 = 1735792^2 + 3116952^2 .

It is a super-2 number, since 2×12728363637568² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728363637569) 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 3 ways as a sum of consecutive naturals, for example, 5426853 + ... + 7409956.

It is an arithmetic number, because the mean of its divisors is an integer number (902124244135).

Almost surely, 2^{12728363637568} is an apocalyptic number.

It is an amenable number.

12728363637568 is a deficient number, since it is larger than the sum of its proper divisors (12531115198212).

12728363637568 is a wasteful number, since it uses less digits than its factorization.

12728363637568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12852314 (or 12852304 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 67.

The spelling of 12728363637568 in words is "twelve trillion, seven hundred twenty-eight billion, three hundred sixty-three million, six hundred thirty-seven thousand, five hundred sixty-eight".