144564161 has 12 divisors (see below), whose sum is σ = 168375492. Its totient is φ = 123758208.

The previous prime is 144564071. The next prime is 144564197. The reversal of 144564161 is 161465441.

It can be written as a sum of positive squares in 2 ways, for example, as 91565761 + 52998400 = 9569^2 + 7280^2 .

It is a de Polignac number, because none of the positive numbers 2^k-144564161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144564061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57221 + ... + 59693.

It is an arithmetic number, because the mean of its divisors is an integer number (14031291).

Almost surely, 2^144564161 is an apocalyptic number.

It is an amenable number.

144564161 is a deficient number, since it is larger than the sum of its proper divisors (23811331).

144564161 is a wasteful number, since it uses less digits than its factorization.

144564161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3673 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 144564161 is about 12023.4837297682. The cubic root of 144564161 is about 524.8318869141.

The spelling of 144564161 in words is "one hundred forty-four million, five hundred sixty-four thousand, one hundred sixty-one".