161444536522 has 16 divisors (see below), whose sum is σ = 243599976000. Its totient is φ = 80245265760.

The previous prime is 161444536499. The next prime is 161444536529. The reversal of 161444536522 is 225635444161.

It is not an unprimeable number, because it can be changed into a prime (161444536529) 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, 269697 + ... + 628987.

It is an arithmetic number, because the mean of its divisors is an integer number (15224998500).

Almost surely, 2^161444536522 is an apocalyptic number.

161444536522 is a deficient number, since it is larger than the sum of its proper divisors (82155439478).

161444536522 is a wasteful number, since it uses less digits than its factorization.

161444536522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360621.

The product of its digits is 691200, while the sum is 43.

The spelling of 161444536522 in words is "one hundred sixty-one billion, four hundred forty-four million, five hundred thirty-six thousand, five hundred twenty-two".