13531135540 has 24 divisors (see below), whose sum is σ = 30601184040. Its totient is φ = 4996111488.

The previous prime is 13531135537. The next prime is 13531135591. The reversal of 13531135540 is 4553113531.

It can be written as a sum of positive squares in 4 ways, for example, as 76527504 + 13454608036 = 8748^2 + 115994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26021155 + ... + 26021674.

It is an arithmetic number, because the mean of its divisors is an integer number (1275049335).

Almost surely, 2^13531135540 is an apocalyptic number.

13531135540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531135540 is an abundant number, since it is smaller than the sum of its proper divisors (17070048500).

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

13531135540 is a wasteful number, since it uses less digits than its factorization.

13531135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52042851 (or 52042849 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 13531135540 in words is "thirteen billion, five hundred thirty-one million, one hundred thirty-five thousand, five hundred forty".