144334361621 has 4 divisors (see below), whose sum is σ = 150609768672. Its totient is φ = 138058954572.

The previous prime is 144334361617. The next prime is 144334361627. The reversal of 144334361621 is 126163433441.

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: 126163433441 = 97 ⋅1300653953.

It is a cyclic number.

It is not a de Polignac number, because 144334361621 - 2² = 144334361617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144334361627) 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, 3137703491 + ... + 3137703536.

It is an arithmetic number, because the mean of its divisors is an integer number (37652442168).

Almost surely, 2^144334361621 is an apocalyptic number.

It is an amenable number.

144334361621 is a deficient number, since it is larger than the sum of its proper divisors (6275407051).

144334361621 is an equidigital number, since it uses as much as digits as its factorization.

144334361621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275407050.

The product of its digits is 124416, while the sum is 38.

The spelling of 144334361621 in words is "one hundred forty-four billion, three hundred thirty-four million, three hundred sixty-one thousand, six hundred twenty-one".