12536791728 has 80 divisors (see below), whose sum is σ = 33948410496. Its totient is φ = 3982164480.

The previous prime is 12536791721. The next prime is 12536791741. The reversal of 12536791728 is 82719763521.

It is a super-2 number, since 2×12536791728² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12536791721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10551 + ... + 158697.

Almost surely, 2^12536791728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12536791728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16974205248).

12536791728 is an abundant number, since it is smaller than the sum of its proper divisors (21411618768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12536791728 is a wasteful number, since it uses less digits than its factorization.

12536791728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148242 (or 148236 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 12536791728 in words is "twelve billion, five hundred thirty-six million, seven hundred ninety-one thousand, seven hundred twenty-eight".