11580533663 has 4 divisors (see below), whose sum is σ = 11979862440. Its totient is φ = 11181204888.

The previous prime is 11580533647. The next prime is 11580533717. The reversal of 11580533663 is 36633508511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11580533663 - 2⁴ = 11580533647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11580533663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11580533623) 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, 199664345 + ... + 199664402.

It is an arithmetic number, because the mean of its divisors is an integer number (2994965610).

Almost surely, 2^11580533663 is an apocalyptic number.

11580533663 is a deficient number, since it is larger than the sum of its proper divisors (399328777).

11580533663 is an equidigital number, since it uses as much as digits as its factorization.

11580533663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399328776.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 11580533663 in words is "eleven billion, five hundred eighty million, five hundred thirty-three thousand, six hundred sixty-three".