144165645 has 48 divisors (see below), whose sum is σ = 270374832. Its totient is φ = 70640640.

The previous prime is 144165643. The next prime is 144165647. The reversal of 144165645 is 546561441.

144165645 is a `hidden beast` number, since 1 + 4 + 4 + 1 + 6 + 5 + 645 = 666.

144165645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (144165643) and next prime (144165647).

It can be written as a sum of positive squares in 8 ways, for example, as 21609 + 144144036 = 147^2 + 12006^2 .

It is not a de Polignac number, because 144165645 - 2¹ = 144165643 is a prime.

It is a super-3 number, since 3×144165645³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144165643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163947 + ... + 164823.

It is an arithmetic number, because the mean of its divisors is an integer number (5632809).

Almost surely, 2^144165645 is an apocalyptic number.

144165645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144165645 is a deficient number, since it is larger than the sum of its proper divisors (126209187).

144165645 is a wasteful number, since it uses less digits than its factorization.

144165645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1179 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 144165645 is about 12006.8998913125. The cubic root of 144165645 is about 524.3491799341.

The spelling of 144165645 in words is "one hundred forty-four million, one hundred sixty-five thousand, six hundred forty-five".