13143440440 has 128 divisors (see below), whose sum is σ = 32797800000. Its totient is φ = 4712338944.

The previous prime is 13143440411. The next prime is 13143440441. The reversal of 13143440440 is 4404434131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13143440399 and 13143440408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143440441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26339311 + ... + 26339809.

Almost surely, 2^13143440440 is an apocalyptic number.

13143440440 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 13143440440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16398900000).

13143440440 is an abundant number, since it is smaller than the sum of its proper divisors (19654359560).

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

13143440440 is an equidigital number, since it uses as much as digits as its factorization.

13143440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 13143440440 its reverse (4404434131), we get a palindrome (17547874571).

The spelling of 13143440440 in words is "thirteen billion, one hundred forty-three million, four hundred forty thousand, four hundred forty".