144646344989 has 2 divisors, whose sum is σ = 144646344990. Its totient is φ = 144646344988.

The previous prime is 144646344949. The next prime is 144646344991. The reversal of 144646344989 is 989443646441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92224579225 + 52421765764 = 303685^2 + 228958^2 .

It is a cyclic number.

It is not a de Polignac number, because 144646344989 - 2¹² = 144646340893 is a prime.

Together with 144646344991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144646344919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72323172494 + 72323172495.

It is an arithmetic number, because the mean of its divisors is an integer number (72323172495).

Almost surely, 2^144646344989 is an apocalyptic number.

It is an amenable number.

144646344989 is a deficient number, since it is larger than the sum of its proper divisors (1).

144646344989 is an equidigital number, since it uses as much as digits as its factorization.

144646344989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71663616, while the sum is 62.

The spelling of 144646344989 in words is "one hundred forty-four billion, six hundred forty-six million, three hundred forty-four thousand, nine hundred eighty-nine".