161015444075 has 24 divisors (see below), whose sum is σ = 200047836000. Its totient is φ = 128561852160.

The previous prime is 161015444071. The next prime is 161015444113. The reversal of 161015444075 is 570444510161.

It is not a de Polignac number, because 161015444075 - 2² = 161015444071 is a prime.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46682951 + ... + 46686399.

It is an arithmetic number, because the mean of its divisors is an integer number (8335326500).

Almost surely, 2^161015444075 is an apocalyptic number.

161015444075 is a deficient number, since it is larger than the sum of its proper divisors (39032391925).

161015444075 is a wasteful number, since it uses less digits than its factorization.

161015444075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551 (or 6546 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 161015444075 in words is "one hundred sixty-one billion, fifteen million, four hundred forty-four thousand, seventy-five".