13444403442553 has 16 divisors (see below), whose sum is σ = 14771431342080. Its totient is φ = 12179627556624.

The previous prime is 13444403442523. The next prime is 13444403442577. The reversal of 13444403442553 is 35524430444431.

It is a de Polignac number, because none of the positive numbers 2^k-13444403442553 is a prime.

It is a super-2 number, since 2×13444403442553² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13444403442523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2727451 + ... + 5858992.

It is an arithmetic number, because the mean of its divisors is an integer number (923214458880).

Almost surely, 2^{13444403442553} is an apocalyptic number.

It is an amenable number.

13444403442553 is a deficient number, since it is larger than the sum of its proper divisors (1327027899527).

13444403442553 is a wasteful number, since it uses less digits than its factorization.

13444403442553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8590068.

The product of its (nonzero) digits is 5529600, while the sum is 46.

Adding to 13444403442553 its reverse (35524430444431), we get a palindrome (48968833886984).

The spelling of 13444403442553 in words is "thirteen trillion, four hundred forty-four billion, four hundred three million, four hundred forty-two thousand, five hundred fifty-three".