144565663549 has 4 divisors (see below), whose sum is σ = 149550686460. Its totient is φ = 139580640640.

The previous prime is 144565663547. The next prime is 144565663573. The reversal of 144565663549 is 945366565441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945366565441 = 197 ⋅4798815053.

It can be written as a sum of positive squares in 2 ways, for example, as 108888120324 + 35677543225 = 329982^2 + 188885^2 .

It is a cyclic number.

It is not a de Polignac number, because 144565663549 - 2¹ = 144565663547 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144565663493 and 144565663502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144565663547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492511412 + ... + 2492511469.

It is an arithmetic number, because the mean of its divisors is an integer number (37387671615).

Almost surely, 2^144565663549 is an apocalyptic number.

It is an amenable number.

144565663549 is a deficient number, since it is larger than the sum of its proper divisors (4985022911).

144565663549 is an equidigital number, since it uses as much as digits as its factorization.

144565663549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985022910.

The product of its digits is 46656000, while the sum is 58.

The spelling of 144565663549 in words is "one hundred forty-four billion, five hundred sixty-five million, six hundred sixty-three thousand, five hundred forty-nine".