161443361122 has 4 divisors (see below), whose sum is σ = 242165041686. Its totient is φ = 80721680560.

The previous prime is 161443361081. The next prime is 161443361141. The reversal of 161443361122 is 221163344161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 142868124441 + 18575236681 = 377979^2 + 136291^2 .

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 as a sum of consecutive naturals, namely, 40360840279 + ... + 40360840282.

Almost surely, 2^161443361122 is an apocalyptic number.

161443361122 is a deficient number, since it is larger than the sum of its proper divisors (80721680564).

161443361122 is an equidigital number, since it uses as much as digits as its factorization.

161443361122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80721680563.

The product of its digits is 20736, while the sum is 34.

The spelling of 161443361122 in words is "one hundred sixty-one billion, four hundred forty-three million, three hundred sixty-one thousand, one hundred twenty-two".