12533315256 has 288 divisors, whose sum is σ = 44132240880. Its totient is φ = 3175603200.

The previous prime is 12533315251. The next prime is 12533315279. The reversal of 12533315256 is 65251333521.

12533315256 is a `hidden beast` number, since 125 + 3 + 3 + 3 + 1 + 525 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12533315256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533315251) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1587190 + ... + 1595066.

Almost surely, 2^12533315256 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 12533315256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22066120440).

12533315256 is an abundant number, since it is smaller than the sum of its proper divisors (31598925624).

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

12533315256 is a wasteful number, since it uses less digits than its factorization.

12533315256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955 (or 7941 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

Adding to 12533315256 its reverse (65251333521), we get a palindrome (77784648777).

The spelling of 12533315256 in words is "twelve billion, five hundred thirty-three million, three hundred fifteen thousand, two hundred fifty-six".