144565618 has 4 divisors (see below), whose sum is σ = 216848430. Its totient is φ = 72282808.

The previous prime is 144565601. The next prime is 144565633. The reversal of 144565618 is 816565441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816565441 = 29 ⋅28157429.

It can be written as a sum of positive squares in only one way, i.e., 98148649 + 46416969 = 9907^2 + 6813^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36141403 + ... + 36141406.

Almost surely, 2^144565618 is an apocalyptic number.

144565618 is a deficient number, since it is larger than the sum of its proper divisors (72282812).

144565618 is an equidigital number, since it uses as much as digits as its factorization.

144565618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72282811.

The product of its digits is 115200, while the sum is 40.

The square root of 144565618 is about 12023.5443193760. The cubic root of 144565618 is about 524.8336500931.

The spelling of 144565618 in words is "one hundred forty-four million, five hundred sixty-five thousand, six hundred eighteen".