16311449911 has 4 divisors (see below), whose sum is σ = 16311902824. Its totient is φ = 16310997000.

The previous prime is 16311449863. The next prime is 16311449929. The reversal of 16311449911 is 11994411361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11994411361 = 109519².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16311449911 is a prime.

It is a super-3 number, since 3×16311449911³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16311449941) 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, 167280 + ... + 246181.

It is an arithmetic number, because the mean of its divisors is an integer number (4077975706).

Almost surely, 2^16311449911 is an apocalyptic number.

16311449911 is a deficient number, since it is larger than the sum of its proper divisors (452913).

16311449911 is an equidigital number, since it uses as much as digits as its factorization.

16311449911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452912.

The product of its digits is 23328, while the sum is 40.

The spelling of 16311449911 in words is "sixteen billion, three hundred eleven million, four hundred forty-nine thousand, nine hundred eleven".