161545144 has 16 divisors (see below), whose sum is σ = 318839400. Its totient is φ = 76521312.

The previous prime is 161545133. The next prime is 161545147. The reversal of 161545144 is 441545161.

161545144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161545147) 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, 531247 + ... + 531550.

Almost surely, 2^161545144 is an apocalyptic number.

It is an amenable number.

161545144 is a deficient number, since it is larger than the sum of its proper divisors (157294256).

161545144 is a wasteful number, since it uses less digits than its factorization.

161545144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062822 (or 1062818 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 161545144 is about 12710.0410699572. The cubic root of 161545144 is about 544.6254970005.

The spelling of 161545144 in words is "one hundred sixty-one million, five hundred forty-five thousand, one hundred forty-four".