4440404402421 has 16 divisors (see below), whose sum is σ = 6581641597440. Its totient is φ = 2644409568960.

The previous prime is 4440404402387. The next prime is 4440404402429. The reversal of 4440404402421 is 1242044040444.

It is not a de Polignac number, because 4440404402421 - 2¹⁴ = 4440404386037 is a prime.

It is a super-2 number, since 2×4440404402421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440404402429) 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, 1836394326 + ... + 1836396743.

It is an arithmetic number, because the mean of its divisors is an integer number (411352599840).

Almost surely, 2^{4440404402421} is an apocalyptic number.

It is an amenable number.

4440404402421 is a deficient number, since it is larger than the sum of its proper divisors (2141237195019).

4440404402421 is a wasteful number, since it uses less digits than its factorization.

4440404402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672791116.

The product of its (nonzero) digits is 65536, while the sum is 33.

Adding to 4440404402421 its reverse (1242044040444), we get a palindrome (5682448442865).

The spelling of 4440404402421 in words is "four trillion, four hundred forty billion, four hundred four million, four hundred two thousand, four hundred twenty-one".