11617081663 has 4 divisors (see below), whose sum is σ = 12673180008. Its totient is φ = 10560983320.

The previous prime is 11617081657. The next prime is 11617081673. The reversal of 11617081663 is 36618071611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11617081663 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11617081633) 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, 528049156 + ... + 528049177.

It is an arithmetic number, because the mean of its divisors is an integer number (3168295002).

Almost surely, 2^11617081663 is an apocalyptic number.

11617081663 is a deficient number, since it is larger than the sum of its proper divisors (1056098345).

11617081663 is a wasteful number, since it uses less digits than its factorization.

11617081663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056098344.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 11617081663 in words is "eleven billion, six hundred seventeen million, eighty-one thousand, six hundred sixty-three".