12555369728 has 72 divisors (see below), whose sum is σ = 27596207520. Its totient is φ = 5653514240.

The previous prime is 12555369721. The next prime is 12555369817. The reversal of 12555369728 is 82796355521.

12555369728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12555369728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555369721) 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 in 7 ways as a sum of consecutive naturals, for example, 280478 + ... + 322146.

It is an arithmetic number, because the mean of its divisors is an integer number (383280660).

Almost surely, 2^12555369728 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 12555369728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13798103760).

12555369728 is an abundant number, since it is smaller than the sum of its proper divisors (15040837792).

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

12555369728 is a wasteful number, since it uses less digits than its factorization.

12555369728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41803 (or 41789 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 53.

It can be divided in two parts, 12555 and 369728, that added together give a palindrome (382283).

The spelling of 12555369728 in words is "twelve billion, five hundred fifty-five million, three hundred sixty-nine thousand, seven hundred twenty-eight".