13012253440 has 72 divisors (see below), whose sum is σ = 31378057200. Its totient is φ = 5169893376.

The previous prime is 13012253437. The next prime is 13012253453. The reversal of 13012253440 is 4435221031.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156607 + ... + 224833.

It is an arithmetic number, because the mean of its divisors is an integer number (435806350).

Almost surely, 2^13012253440 is an apocalyptic number.

13012253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13012253440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15689028600).

13012253440 is an abundant number, since it is smaller than the sum of its proper divisors (18365803760).

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

13012253440 is an equidigital number, since it uses as much as digits as its factorization.

13012253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68397 (or 68383 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 13012253440 its reverse (4435221031), we get a palindrome (17447474471).

The spelling of 13012253440 in words is "thirteen billion, twelve million, two hundred fifty-three thousand, four hundred forty".