161745448 has 16 divisors (see below), whose sum is σ = 304600500. Its totient is φ = 80518656.

The previous prime is 161745431. The next prime is 161745449. The reversal of 161745448 is 844547161.

It can be written as a sum of positive squares in 2 ways, for example, as 129004164 + 32741284 = 11358^2 + 5722^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161745448.

It is not an unprimeable number, because it can be changed into a prime (161745449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42313 + ... + 45976.

Almost surely, 2^161745448 is an apocalyptic number.

It is an amenable number.

161745448 is a deficient number, since it is larger than the sum of its proper divisors (142855052).

161745448 is a wasteful number, since it uses less digits than its factorization.

161745448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88524 (or 88520 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 161745448 is about 12717.9183831317. The cubic root of 161745448 is about 544.8505024402.

The spelling of 161745448 in words is "one hundred sixty-one million, seven hundred forty-five thousand, four hundred forty-eight".