144644436440 has 64 divisors (see below), whose sum is σ = 371977220160. Its totient is φ = 49587793920.

The previous prime is 144644436413. The next prime is 144644436449. The reversal of 144644436440 is 44634446441.

It is a junction number, because it is equal to n+sod(n) for n = 144644436391 and 144644436400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144644436449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4621484 + ... + 4652676.

It is an arithmetic number, because the mean of its divisors is an integer number (5812144065).

Almost surely, 2^144644436440 is an apocalyptic number.

144644436440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144644436440 is an abundant number, since it is smaller than the sum of its proper divisors (227332783720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144644436440 is a wasteful number, since it uses less digits than its factorization.

144644436440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47772 (or 47768 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 44.

The spelling of 144644436440 in words is "one hundred forty-four billion, six hundred forty-four million, four hundred thirty-six thousand, four hundred forty".