144521561137 has 4 divisors (see below), whose sum is σ = 144831029616. Its totient is φ = 144212092660.

The previous prime is 144521561099. The next prime is 144521561201. The reversal of 144521561137 is 731165125441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731165125441 = 65579 ⋅11149379.

It is a cyclic number.

It is not a de Polignac number, because 144521561137 - 2³⁵ = 110161822769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144521561137.

It is not an unprimeable number, because it can be changed into a prime (144521561837) 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, 154733539 + ... + 154734472.

It is an arithmetic number, because the mean of its divisors is an integer number (36207757404).

Almost surely, 2^144521561137 is an apocalyptic number.

It is an amenable number.

144521561137 is a deficient number, since it is larger than the sum of its proper divisors (309468479).

144521561137 is an equidigital number, since it uses as much as digits as its factorization.

144521561137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309468478.

The product of its digits is 100800, while the sum is 40.

Adding to 144521561137 its reverse (731165125441), we get a palindrome (875686686578).

The spelling of 144521561137 in words is "one hundred forty-four billion, five hundred twenty-one million, five hundred sixty-one thousand, one hundred thirty-seven".