144564553 has 8 divisors (see below), whose sum is σ = 168588800. Its totient is φ = 123912180.

The previous prime is 144564551. The next prime is 144564557. The reversal of 144564553 is 355465441.

It is not a de Polignac number, because 144564553 - 2¹ = 144564551 is a prime.

It is the 12024-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144564551) by changing a digit.

It is a nontrivial repunit in base 12023.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210393 + ... + 211078.

It is an arithmetic number, because the mean of its divisors is an integer number (21073600).

Almost surely, 2^144564553 is an apocalyptic number.

It is an amenable number.

144564553 is a deficient number, since it is larger than the sum of its proper divisors (24024247).

144564553 is an frugal number, since it uses more digits than its factorization.

144564553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421492 (or 421478 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 144564553 is about 12023.5000311889. The cubic root of 144564553 is about 524.8323612915.

The spelling of 144564553 in words is "one hundred forty-four million, five hundred sixty-four thousand, five hundred fifty-three".