12533115440 has 40 divisors (see below), whose sum is σ = 29411845200. Its totient is φ = 4966390016.

The previous prime is 12533115433. The next prime is 12533115467. The reversal of 12533115440 is 4451133521.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 723515 + ... + 740634.

It is an arithmetic number, because the mean of its divisors is an integer number (735296130).

Almost surely, 2^12533115440 is an apocalyptic number.

12533115440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12533115440 is an abundant number, since it is smaller than the sum of its proper divisors (16878729760).

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

12533115440 is a wasteful number, since it uses less digits than its factorization.

12533115440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464269 (or 1464263 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 12533115440 its reverse (4451133521), we get a palindrome (16984248961).

The spelling of 12533115440 in words is "twelve billion, five hundred thirty-three million, one hundred fifteen thousand, four hundred forty".