244444040021 has 4 divisors (see below), whose sum is σ = 246817283232. Its totient is φ = 242070796812.

The previous prime is 244444039999. The next prime is 244444040033. The reversal of 244444040021 is 120040444442.

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.

It is a cyclic number.

It is not a de Polignac number, because 244444040021 - 2²⁶ = 244376931157 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 (244444040051) 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, 1186621451 + ... + 1186621656.

It is an arithmetic number, because the mean of its divisors is an integer number (61704320808).

Almost surely, 2^244444040021 is an apocalyptic number.

It is an amenable number.

244444040021 is a deficient number, since it is larger than the sum of its proper divisors (2373243211).

244444040021 is a wasteful number, since it uses less digits than its factorization.

244444040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373243210.

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 244444040021 its reverse (120040444442), we get a palindrome (364484484463).

The spelling of 244444040021 in words is "two hundred forty-four billion, four hundred forty-four million, forty thousand, twenty-one".