144321665921 has 8 divisors (see below), whose sum is σ = 147423283200. Its totient is φ = 141221338048.

The previous prime is 144321665909. The next prime is 144321665927. The reversal of 144321665921 is 129566123441.

It is a happy number.

144321665921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144321665921 - 2⁶ = 144321665857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144321665927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94376 + ... + 545481.

It is an arithmetic number, because the mean of its divisors is an integer number (18427910400).

Almost surely, 2^144321665921 is an apocalyptic number.

It is an amenable number.

144321665921 is a deficient number, since it is larger than the sum of its proper divisors (3101617279).

144321665921 is an equidigital number, since it uses as much as digits as its factorization.

144321665921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644703.

The product of its digits is 311040, while the sum is 44.

The spelling of 144321665921 in words is "one hundred forty-four billion, three hundred twenty-one million, six hundred sixty-five thousand, nine hundred twenty-one".