11718815843 has 12 divisors (see below), whose sum is σ = 13949119800. Its totient is φ = 9811099872.

The previous prime is 11718815821. The next prime is 11718815897. The reversal of 11718815843 is 34851881711.

It is not a de Polignac number, because 11718815843 - 2¹⁸ = 11718553699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11718815803) 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, 2778818 + ... + 2783031.

It is an arithmetic number, because the mean of its divisors is an integer number (1162426650).

Almost surely, 2^11718815843 is an apocalyptic number.

11718815843 is a deficient number, since it is larger than the sum of its proper divisors (2230303957).

11718815843 is an equidigital number, since it uses as much as digits as its factorization.

11718815843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561906 (or 5561899 counting only the distinct ones).

The product of its digits is 215040, while the sum is 47.

The spelling of 11718815843 in words is "eleven billion, seven hundred eighteen million, eight hundred fifteen thousand, eight hundred forty-three".