161316311311 has 8 divisors (see below), whose sum is σ = 174028252464. Its totient is φ = 148962453120.

The previous prime is 161316311279. The next prime is 161316311327. The reversal of 161316311311 is 113113613161.

161316311311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161316311311 - 2⁵ = 161316311279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161316311311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161316317311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89519805 + ... + 89521606.

It is an arithmetic number, because the mean of its divisors is an integer number (21753531558).

Almost surely, 2^161316311311 is an apocalyptic number.

161316311311 is a deficient number, since it is larger than the sum of its proper divisors (12711941153).

161316311311 is a wasteful number, since it uses less digits than its factorization.

161316311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179041481.

The product of its digits is 972, while the sum is 28.

Adding to 161316311311 its reverse (113113613161), we get a palindrome (274429924472).

The spelling of 161316311311 in words is "one hundred sixty-one billion, three hundred sixteen million, three hundred eleven thousand, three hundred eleven".