161362643212 has 12 divisors (see below), whose sum is σ = 285126224656. Its totient is φ = 79898007600.

The previous prime is 161362643207. The next prime is 161362643219. The reversal of 161362643212 is 212346263161.

It is not an unprimeable number, because it can be changed into a prime (161362643219) by changing a digit.

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, 195828039 + ... + 195828862.

Almost surely, 2^161362643212 is an apocalyptic number.

It is an amenable number.

161362643212 is a deficient number, since it is larger than the sum of its proper divisors (123763581444).

161362643212 is a wasteful number, since it uses less digits than its factorization.

161362643212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391657008 (or 391657006 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The spelling of 161362643212 in words is "one hundred sixty-one billion, three hundred sixty-two million, six hundred forty-three thousand, two hundred twelve".