11663687047 has 4 divisors (see below), whose sum is σ = 11772693576. Its totient is φ = 11554680520.

The previous prime is 11663687041. The next prime is 11663687059. The reversal of 11663687047 is 74078636611.

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-11663687047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663687041) 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, 54503104 + ... + 54503317.

It is an arithmetic number, because the mean of its divisors is an integer number (2943173394).

Almost surely, 2^11663687047 is an apocalyptic number.

11663687047 is a deficient number, since it is larger than the sum of its proper divisors (109006529).

11663687047 is a wasteful number, since it uses less digits than its factorization.

11663687047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109006528.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 11663687047 in words is "eleven billion, six hundred sixty-three million, six hundred eighty-seven thousand, forty-seven".