13530543999 has 24 divisors (see below), whose sum is σ = 21382127280. Its totient is φ = 7585853184.

The previous prime is 13530543989. The next prime is 13530544003. The reversal of 13530543999 is 99934503531.

It is not a de Polignac number, because 13530543999 - 2²⁷ = 13396326271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530543919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 860554 + ... + 876135.

It is an arithmetic number, because the mean of its divisors is an integer number (890921970).

Almost surely, 2^13530543999 is an apocalyptic number.

13530543999 is a deficient number, since it is larger than the sum of its proper divisors (7851583281).

13530543999 is a wasteful number, since it uses less digits than its factorization.

13530543999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736759 (or 1736752 counting only the distinct ones).

The product of its (nonzero) digits is 1968300, while the sum is 51.

The spelling of 13530543999 in words is "thirteen billion, five hundred thirty million, five hundred forty-three thousand, nine hundred ninety-nine".