144516545581 has 12 divisors (see below), whose sum is σ = 149355839100. Its totient is φ = 139829353920.

The previous prime is 144516545549. The next prime is 144516545599. The reversal of 144516545581 is 185545615441.

It can be written as a sum of positive squares in 2 ways, for example, as 141865222500 + 2651323081 = 376650^2 + 51491^2 .

It is not a de Polignac number, because 144516545581 - 2⁵ = 144516545549 is a prime.

It is a super-2 number, since 2×144516545581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144516549581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7360105 + ... + 7379713.

It is an arithmetic number, because the mean of its divisors is an integer number (12446319925).

Almost surely, 2^144516545581 is an apocalyptic number.

It is an amenable number.

144516545581 is a deficient number, since it is larger than the sum of its proper divisors (4839293519).

144516545581 is an equidigital number, since it uses as much as digits as its factorization.

144516545581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27340 (or 27309 counting only the distinct ones).

The product of its digits is 1920000, while the sum is 49.

The spelling of 144516545581 in words is "one hundred forty-four billion, five hundred sixteen million, five hundred forty-five thousand, five hundred eighty-one".