13540140440 has 16 divisors (see below), whose sum is σ = 30465316080. Its totient is φ = 5416056160.

The previous prime is 13540140437. The next prime is 13540140461. The reversal of 13540140440 is 4404104531.

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, 169251716 + ... + 169251795.

It is an arithmetic number, because the mean of its divisors is an integer number (1904082255).

Almost surely, 2^13540140440 is an apocalyptic number.

13540140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13540140440 is an abundant number, since it is smaller than the sum of its proper divisors (16925175640).

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

13540140440 is a wasteful number, since it uses less digits than its factorization.

13540140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338503522 (or 338503518 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 13540140440 its reverse (4404104531), we get a palindrome (17944244971).

The spelling of 13540140440 in words is "thirteen billion, five hundred forty million, one hundred forty thousand, four hundred forty".