13531145445 has 32 divisors (see below), whose sum is σ = 24230989440. Its totient is φ = 7163925120.

The previous prime is 13531145371. The next prime is 13531145447. The reversal of 13531145445 is 54454113531.

13531145445 is a `hidden beast` number, since 135 + 31 + 1 + 454 + 45 = 666.

It is not a de Polignac number, because 13531145445 - 2¹¹ = 13531143397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531145447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347311 + ... + 384300.

It is an arithmetic number, because the mean of its divisors is an integer number (757218420).

Almost surely, 2^13531145445 is an apocalyptic number.

13531145445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13531145445 is a deficient number, since it is larger than the sum of its proper divisors (10699843995).

13531145445 is a wasteful number, since it uses less digits than its factorization.

13531145445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731762 (or 731756 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 13531145445 its reverse (54454113531), we get a palindrome (67985258976).

The spelling of 13531145445 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-five thousand, four hundred forty-five".