161311164311 has 8 divisors (see below), whose sum is σ = 175978929024. Its totient is φ = 146643918520.

The previous prime is 161311164307. The next prime is 161311164383. The reversal of 161311164311 is 113461113161.

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

It is not a de Polignac number, because 161311164311 - 2² = 161311164307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161311163311) 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, 827156 + ... + 1003398.

It is an arithmetic number, because the mean of its divisors is an integer number (21997366128).

Almost surely, 2^161311164311 is an apocalyptic number.

161311164311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161311164311 is a deficient number, since it is larger than the sum of its proper divisors (14667764713).

161311164311 is a wasteful number, since it uses less digits than its factorization.

161311164311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259461.

The product of its digits is 1296, while the sum is 29.

Adding to 161311164311 its reverse (113461113161), we get a palindrome (274772277472).

The spelling of 161311164311 in words is "one hundred sixty-one billion, three hundred eleven million, one hundred sixty-four thousand, three hundred eleven".