13133456563 has 4 divisors (see below), whose sum is σ = 13155382800. Its totient is φ = 13111530328.

The previous prime is 13133456549. The next prime is 13133456579. The reversal of 13133456563 is 36565433131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36565433131 = 31 ⋅1179530101.

It is a cyclic number.

It is not a de Polignac number, because 13133456563 - 2²¹ = 13131359411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13133456533) 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, 10962220 + ... + 10963417.

It is an arithmetic number, because the mean of its divisors is an integer number (3288845700).

Almost surely, 2^13133456563 is an apocalyptic number.

13133456563 is a deficient number, since it is larger than the sum of its proper divisors (21926237).

13133456563 is an equidigital number, since it uses as much as digits as its factorization.

13133456563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21926236.

The product of its digits is 291600, while the sum is 40.

Adding to 13133456563 its reverse (36565433131), we get a palindrome (49698889694).

The spelling of 13133456563 in words is "thirteen billion, one hundred thirty-three million, four hundred fifty-six thousand, five hundred sixty-three".