11641603563 has 12 divisors (see below), whose sum is σ = 17700684040. Its totient is φ = 7352591616.

The previous prime is 11641603517. The next prime is 11641603579. The reversal of 11641603563 is 36530614611.

11641603563 is a `hidden beast` number, since 1 + 1 + 6 + 41 + 603 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 11641603563 - 2²⁰ = 11640554987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11641603583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34039606 + ... + 34039947.

Almost surely, 2^11641603563 is an apocalyptic number.

11641603563 is a deficient number, since it is larger than the sum of its proper divisors (6059080477).

11641603563 is a wasteful number, since it uses less digits than its factorization.

11641603563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68079578 (or 68079575 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 11641603563 in words is "eleven billion, six hundred forty-one million, six hundred three thousand, five hundred sixty-three".