161311164522 has 8 divisors (see below), whose sum is σ = 322622329056. Its totient is φ = 53770388172.

The previous prime is 161311164503. The next prime is 161311164551. The reversal of 161311164522 is 225461113161.

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

161311164522 is an admirable number.

It is a super-3 number, since 3×161311164522³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13442597038 + ... + 13442597049.

It is an arithmetic number, because the mean of its divisors is an integer number (40327791132).

Almost surely, 2^161311164522 is an apocalyptic number.

161311164522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161311164522 is a wasteful number, since it uses less digits than its factorization.

161311164522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26885194092.

The product of its digits is 8640, while the sum is 33.

Adding to 161311164522 its reverse (225461113161), we get a palindrome (386772277683).

The spelling of 161311164522 in words is "one hundred sixty-one billion, three hundred eleven million, one hundred sixty-four thousand, five hundred twenty-two".