144042564665 has 4 divisors (see below), whose sum is σ = 172851077604. Its totient is φ = 115234051728.

The previous prime is 144042564649. The next prime is 144042564719. The reversal of 144042564665 is 566465240441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566465240441 = 14207 ⋅39872263.

It can be written as a sum of positive squares in 2 ways, for example, as 41660483881 + 102382080784 = 204109^2 + 319972^2 .

It is a cyclic number.

It is not a de Polignac number, because 144042564665 - 2⁴ = 144042564649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14404256462 + ... + 14404256471.

It is an arithmetic number, because the mean of its divisors is an integer number (43212769401).

Almost surely, 2^144042564665 is an apocalyptic number.

It is an amenable number.

144042564665 is a deficient number, since it is larger than the sum of its proper divisors (28808512939).

144042564665 is an equidigital number, since it uses as much as digits as its factorization.

144042564665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28808512938.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 144042564665 in words is "one hundred forty-four billion, forty-two million, five hundred sixty-four thousand, six hundred sixty-five".