144521561837 has 2 divisors, whose sum is σ = 144521561838. Its totient is φ = 144521561836.

The previous prime is 144521561827. The next prime is 144521561839. The reversal of 144521561837 is 738165125441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142284366436 + 2237195401 = 377206^2 + 47299^2 .

It is an emirp because it is prime and its reverse (738165125441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144521561837 - 2⁶ = 144521561773 is a prime.

Together with 144521561839, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 144521561791 and 144521561800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144521561839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72260780918 + 72260780919.

It is an arithmetic number, because the mean of its divisors is an integer number (72260780919).

Almost surely, 2^144521561837 is an apocalyptic number.

It is an amenable number.

144521561837 is a deficient number, since it is larger than the sum of its proper divisors (1).

144521561837 is an equidigital number, since it uses as much as digits as its factorization.

144521561837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 47.

The spelling of 144521561837 in words is "one hundred forty-four billion, five hundred twenty-one million, five hundred sixty-one thousand, eight hundred thirty-seven".