161015444074 has 4 divisors (see below), whose sum is σ = 241523166114. Its totient is φ = 80507722036.

The previous prime is 161015444071. The next prime is 161015444113. The reversal of 161015444074 is 470444510161.

161015444074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470444510161 = 47 ⋅10009457663.

It can be written as a sum of positive squares in only one way, i.e., 158686706025 + 2328738049 = 398355^2 + 48257^2 .

It is not an unprimeable number, because it can be changed into a prime (161015444071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40253861017 + ... + 40253861020.

Almost surely, 2^161015444074 is an apocalyptic number.

161015444074 is a deficient number, since it is larger than the sum of its proper divisors (80507722040).

161015444074 is an equidigital number, since it uses as much as digits as its factorization.

161015444074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80507722039.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 161015444074 in words is "one hundred sixty-one billion, fifteen million, four hundred forty-four thousand, seventy-four".