161504041122 has 18 divisors (see below), whose sum is σ = 349929116667. Its totient is φ = 53834112036.

The previous prime is 161504041109. The next prime is 161504041123. The reversal of 161504041122 is 221140405161.

161504041122 is a `hidden beast` number, since 1 + 615 + 0 + 4 + 0 + 41 + 1 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80752020561 + 80752020561 = 284169^2 + 284169^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=284169.

It is not an unprimeable number, because it can be changed into a prime (161504041123) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1657653 + ... + 1752375.

Almost surely, 2^161504041122 is an apocalyptic number.

161504041122 is an abundant number, since it is smaller than the sum of its proper divisors (188425075545).

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

161504041122 is an frugal number, since it uses more digits than its factorization.

161504041122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189454 (or 94728 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 161504041122 its reverse (221140405161), we get a palindrome (382644446283).

The spelling of 161504041122 in words is "one hundred sixty-one billion, five hundred four million, forty-one thousand, one hundred twenty-two".