11805938611 has 4 divisors (see below), whose sum is σ = 11817781072. Its totient is φ = 11794096152.

The previous prime is 11805938569. The next prime is 11805938621. The reversal of 11805938611 is 11683950811.

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 11805938611 - 2¹¹ = 11805936563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11805938621) 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, 5919735 + ... + 5921728.

It is an arithmetic number, because the mean of its divisors is an integer number (2954445268).

Almost surely, 2^11805938611 is an apocalyptic number.

11805938611 is a deficient number, since it is larger than the sum of its proper divisors (11842461).

11805938611 is an equidigital number, since it uses as much as digits as its factorization.

11805938611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842460.

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 11805938611 in words is "eleven billion, eight hundred five million, nine hundred thirty-eight thousand, six hundred eleven".