13455531189 has 20 divisors (see below), whose sum is σ = 20105601516. Its totient is φ = 8967960576.

The previous prime is 13455531151. The next prime is 13455531211. The reversal of 13455531189 is 98113555431.

13455531189 is a `hidden beast` number, since 1 + 3 + 4 + 5 + 553 + 11 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6434767089 + 7020764100 = 80217^2 + 83790^2 .

It is not a de Polignac number, because 13455531189 - 2¹⁷ = 13455400117 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 (13455531109) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 314677 + ... + 354869.

Almost surely, 2^13455531189 is an apocalyptic number.

It is an amenable number.

13455531189 is a deficient number, since it is larger than the sum of its proper divisors (6650070327).

13455531189 is an equidigital number, since it uses as much as digits as its factorization.

13455531189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44338 (or 44329 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

It can be divided in two parts, 13455 and 531189, that added together give a square (544644 = 738²).

The spelling of 13455531189 in words is "thirteen billion, four hundred fifty-five million, five hundred thirty-one thousand, one hundred eighty-nine".