144660646421 has 4 divisors (see below), whose sum is σ = 144661507200. Its totient is φ = 144659785644.

The previous prime is 144660646393. The next prime is 144660646433. The reversal of 144660646421 is 124646066441.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144660646421 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 (144660646121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86951 + ... + 544868.

It is an arithmetic number, because the mean of its divisors is an integer number (36165376800).

Almost surely, 2^144660646421 is an apocalyptic number.

It is an amenable number.

144660646421 is a deficient number, since it is larger than the sum of its proper divisors (860779).

144660646421 is an equidigital number, since it uses as much as digits as its factorization.

144660646421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860778.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 144660646421 in words is "one hundred forty-four billion, six hundred sixty million, six hundred forty-six thousand, four hundred twenty-one".