13543534240 has 24 divisors (see below), whose sum is σ = 31996600020. Its totient is φ = 5417413632.

The previous prime is 13543534237. The next prime is 13543534271. The reversal of 13543534240 is 4243534531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12944067984 + 599466256 = 113772^2 + 24484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13543534196 and 13543534205.

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, 42323385 + ... + 42323704.

Almost surely, 2^13543534240 is an apocalyptic number.

13543534240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13543534240 is an abundant number, since it is smaller than the sum of its proper divisors (18453065780).

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

13543534240 is an equidigital number, since it uses as much as digits as its factorization.

13543534240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84647104 (or 84647096 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

The spelling of 13543534240 in words is "thirteen billion, five hundred forty-three million, five hundred thirty-four thousand, two hundred forty".