11816188731 has 12 divisors (see below), whose sum is σ = 17069659152. Its totient is φ = 7876614096.

The previous prime is 11816188729. The next prime is 11816188739. The reversal of 11816188731 is 13788161811.

It is a happy number.

11816188731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11816188731 - 2¹ = 11816188729 is a prime.

It is a super-2 number, since 2×11816188731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11816188739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24930 + ... + 155736.

It is an arithmetic number, because the mean of its divisors is an integer number (1422471596).

Almost surely, 2^11816188731 is an apocalyptic number.

11816188731 is a deficient number, since it is larger than the sum of its proper divisors (5253470421).

11816188731 is a wasteful number, since it uses less digits than its factorization.

11816188731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140850 (or 140847 counting only the distinct ones).

The product of its digits is 64512, while the sum is 45.

The spelling of 11816188731 in words is "eleven billion, eight hundred sixteen million, one hundred eighty-eight thousand, seven hundred thirty-one".