13043513540 has 12 divisors (see below), whose sum is σ = 27391378476. Its totient is φ = 5217405408.

The previous prime is 13043513507. The next prime is 13043513543. The reversal of 13043513540 is 4531534031.

It can be written as a sum of positive squares in 2 ways, for example, as 2541773056 + 10501740484 = 50416^2 + 102478^2 .

It is not an unprimeable number, because it can be changed into a prime (13043513543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326087819 + ... + 326087858.

It is an arithmetic number, because the mean of its divisors is an integer number (2282614873).

Almost surely, 2^13043513540 is an apocalyptic number.

13043513540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13043513540 is an abundant number, since it is smaller than the sum of its proper divisors (14347864936).

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

13043513540 is a wasteful number, since it uses less digits than its factorization.

13043513540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652175686 (or 652175684 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 13043513540 in words is "thirteen billion, forty-three million, five hundred thirteen thousand, five hundred forty".