6442653220441 has 4 divisors (see below), whose sum is σ = 6442672506084. Its totient is φ = 6442633934800.

The previous prime is 6442653220429. The next prime is 6442653220477. The reversal of 6442653220441 is 1440223562446.

6442653220441 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6034741078041 + 407912142400 = 2456571^2 + 638680^2 .

It is a cyclic number.

It is not a de Polignac number, because 6442653220441 - 2⁹ = 6442653219929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442653221441) 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, 9132730 + ... + 9812851.

It is an arithmetic number, because the mean of its divisors is an integer number (1610668126521).

Almost surely, 2^{6442653220441} is an apocalyptic number.

It is an amenable number.

6442653220441 is a deficient number, since it is larger than the sum of its proper divisors (19285643).

6442653220441 is a wasteful number, since it uses less digits than its factorization.

6442653220441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19285642.

The product of its (nonzero) digits is 1105920, while the sum is 43.

Adding to 6442653220441 its reverse (1440223562446), we get a palindrome (7882876782887).

The spelling of 6442653220441 in words is "six trillion, four hundred forty-two billion, six hundred fifty-three million, two hundred twenty thousand, four hundred forty-one".