11811782899 has 8 divisors (see below), whose sum is σ = 13528090368. Its totient is φ = 10102702920.

The previous prime is 11811782861. The next prime is 11811782909. The reversal of 11811782899 is 99828711811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11811782899 - 2¹⁵ = 11811750131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11811722899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803367 + ... + 1809904.

It is an arithmetic number, because the mean of its divisors is an integer number (1691011296).

Almost surely, 2^11811782899 is an apocalyptic number.

11811782899 is a deficient number, since it is larger than the sum of its proper divisors (1716307469).

11811782899 is an equidigital number, since it uses as much as digits as its factorization.

11811782899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613745.

The product of its digits is 580608, while the sum is 55.

The spelling of 11811782899 in words is "eleven billion, eight hundred eleven million, seven hundred eighty-two thousand, eight hundred ninety-nine".