13531155552 has 72 divisors (see below), whose sum is σ = 38570968800. Its totient is φ = 4499631360.

The previous prime is 13531155551. The next prime is 13531155563. The reversal of 13531155552 is 25555113531.

13531155552 is a `hidden beast` number, since 1 + 3 + 53 + 1 + 1 + 55 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531155551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65449 + ... + 177047.

It is an arithmetic number, because the mean of its divisors is an integer number (535707900).

Almost surely, 2^13531155552 is an apocalyptic number.

13531155552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13531155552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19285484400).

13531155552 is an abundant number, since it is smaller than the sum of its proper divisors (25039813248).

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

13531155552 is a wasteful number, since it uses less digits than its factorization.

13531155552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112036 (or 112025 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 13531155552 in words is "thirteen billion, five hundred thirty-one million, one hundred fifty-five thousand, five hundred fifty-two".