13544220440 has 96 divisors (see below), whose sum is σ = 31459361040. Its totient is φ = 5247790080.

The previous prime is 13544220439. The next prime is 13544220497. The reversal of 13544220440 is 4402244531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10556039 + ... + 10557321.

Almost surely, 2^13544220440 is an apocalyptic number.

13544220440 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 13544220440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15729680520).

13544220440 is an abundant number, since it is smaller than the sum of its proper divisors (17915140600).

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

13544220440 is a wasteful number, since it uses less digits than its factorization.

13544220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 13544220440 its reverse (4402244531), we get a palindrome (17946464971).

The spelling of 13544220440 in words is "thirteen billion, five hundred forty-four million, two hundred twenty thousand, four hundred forty".