13444475523 has 4 divisors (see below), whose sum is σ = 17925967368. Its totient is φ = 8962983680.

The previous prime is 13444475521. The next prime is 13444475533. The reversal of 13444475523 is 32557444431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32557444431 = 3 ⋅10852481477.

It is a cyclic number.

It is not a de Polignac number, because 13444475523 - 2¹ = 13444475521 is a prime.

It is a super-2 number, since 2×13444475523² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13444475521) 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, 2240745918 + ... + 2240745923.

It is an arithmetic number, because the mean of its divisors is an integer number (4481491842).

Almost surely, 2^13444475523 is an apocalyptic number.

13444475523 is a deficient number, since it is larger than the sum of its proper divisors (4481491845).

13444475523 is an equidigital number, since it uses as much as digits as its factorization.

13444475523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481491844.

The product of its digits is 806400, while the sum is 42.

The spelling of 13444475523 in words is "thirteen billion, four hundred forty-four million, four hundred seventy-five thousand, five hundred twenty-three".