11821968663 has 16 divisors (see below), whose sum is σ = 16616304000. Its totient is φ = 7455676320.

The previous prime is 11821968661. The next prime is 11821968677. The reversal of 11821968663 is 36686912811.

It is not a de Polignac number, because 11821968663 - 2¹ = 11821968661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821968661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110688 + ... + 189461.

It is an arithmetic number, because the mean of its divisors is an integer number (1038519000).

Almost surely, 2^11821968663 is an apocalyptic number.

11821968663 is a deficient number, since it is larger than the sum of its proper divisors (4794335337).

11821968663 is a wasteful number, since it uses less digits than its factorization.

11821968663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300862.

The product of its digits is 746496, while the sum is 51.

The spelling of 11821968663 in words is "eleven billion, eight hundred twenty-one million, nine hundred sixty-eight thousand, six hundred sixty-three".