144421387138 has 32 divisors (see below), whose sum is σ = 263658374784. Its totient is φ = 57917260032.

The previous prime is 144421387129. The next prime is 144421387163. The reversal of 144421387138 is 831783124441.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1712620 + ... + 1794967.

It is an arithmetic number, because the mean of its divisors is an integer number (8239324212).

Almost surely, 2^144421387138 is an apocalyptic number.

144421387138 is a deficient number, since it is larger than the sum of its proper divisors (119236987646).

144421387138 is a wasteful number, since it uses less digits than its factorization.

144421387138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507786.

The product of its digits is 516096, while the sum is 46.

It can be divided in two parts, 1444213 and 87138, that added together give a palindrome (1531351).

The spelling of 144421387138 in words is "one hundred forty-four billion, four hundred twenty-one million, three hundred eighty-seven thousand, one hundred thirty-eight".