161106449522 has 18 divisors (see below), whose sum is σ = 242578467117. Its totient is φ = 80248119336.

The previous prime is 161106449521. The next prime is 161106449591. The reversal of 161106449522 is 225944601161.

It can be written as a sum of positive squares in 2 ways, for example, as 89736792721 + 71369656801 = 299561^2 + 267151^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=283819.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161106449522.

It is not an unprimeable number, because it can be changed into a prime (161106449521) 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, 262816088 + ... + 262816700.

Almost surely, 2^161106449522 is an apocalyptic number.

161106449522 is a deficient number, since it is larger than the sum of its proper divisors (81472017595).

161106449522 is an frugal number, since it uses more digits than its factorization.

161106449522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 161106449522 in words is "one hundred sixty-one billion, one hundred six million, four hundred forty-nine thousand, five hundred twenty-two".