13532121440 has 24 divisors (see below), whose sum is σ = 31969637280. Its totient is φ = 5412848512.

The previous prime is 13532121391. The next prime is 13532121451. The reversal of 13532121440 is 4412123531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42287720 + ... + 42288039.

It is an arithmetic number, because the mean of its divisors is an integer number (1332068220).

Almost surely, 2^13532121440 is an apocalyptic number.

13532121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13532121440 is an abundant number, since it is smaller than the sum of its proper divisors (18437515840).

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

13532121440 is an equidigital number, since it uses as much as digits as its factorization.

13532121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84575774 (or 84575766 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 13532121440 its reverse (4412123531), we get a palindrome (17944244971).

The spelling of 13532121440 in words is "thirteen billion, five hundred thirty-two million, one hundred twenty-one thousand, four hundred forty".