13531145144 has 16 divisors (see below), whose sum is σ = 27677342520. Its totient is φ = 6150520480.

The previous prime is 13531145141. The next prime is 13531145149. The reversal of 13531145144 is 44154113531.

It is a self number, because there is not a number n which added to its sum of digits gives 13531145144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531145141) 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, 76881419 + ... + 76881594.

Almost surely, 2^13531145144 is an apocalyptic number.

It is an amenable number.

13531145144 is an abundant number, since it is smaller than the sum of its proper divisors (14146197376).

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

13531145144 is a wasteful number, since it uses less digits than its factorization.

13531145144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153763030 (or 153763026 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

Adding to 13531145144 its reverse (44154113531), we get a palindrome (57685258675).

The spelling of 13531145144 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-five thousand, one hundred forty-four".