13243453440 has 624 divisors, whose sum is σ = 50827186368. Its totient is φ = 2934177792.

The previous prime is 13243453411. The next prime is 13243453453. The reversal of 13243453440 is 4435434231.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159559639 + ... + 159559721.

Almost surely, 2^13243453440 is an apocalyptic number.

13243453440 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 13243453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25413593184).

13243453440 is an abundant number, since it is smaller than the sum of its proper divisors (37583732928).

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

13243453440 is an equidigital number, since it uses as much as digits as its factorization.

13243453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 13243453440 its reverse (4435434231), we get a palindrome (17678887671).

The spelling of 13243453440 in words is "thirteen billion, two hundred forty-three million, four hundred fifty-three thousand, four hundred forty".