4440040440021 has 16 divisors (see below), whose sum is σ = 6964769318400. Its totient is φ = 2785907726784.

The previous prime is 4440040440007. The next prime is 4440040440041. The reversal of 4440040440021 is 1200440400444.

It is not a de Polignac number, because 4440040440021 - 2¹⁸ = 4440040177877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440040440041) 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, 4836644901 + ... + 4836645818.

It is an arithmetic number, because the mean of its divisors is an integer number (435298082400).

Almost surely, 2^{4440040440021} is an apocalyptic number.

It is an amenable number.

4440040440021 is a deficient number, since it is larger than the sum of its proper divisors (2524728878379).

4440040440021 is a wasteful number, since it uses less digits than its factorization.

4440040440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9673290745 (or 9673290739 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 4440040440021 its reverse (1200440400444), we get a palindrome (5640480840465).

The spelling of 4440040440021 in words is "four trillion, four hundred forty billion, forty million, four hundred forty thousand, twenty-one".