441643613897 has 2 divisors, whose sum is σ = 441643613898. Its totient is φ = 441643613896.

The previous prime is 441643613891. The next prime is 441643613899. The reversal of 441643613897 is 798316346144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326904923536 + 114738690361 = 571756^2 + 338731^2 .

It is a cyclic number.

It is not a de Polignac number, because 441643613897 - 2⁶ = 441643613833 is a prime.

Together with 441643613899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (441643613891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220821806948 + 220821806949.

It is an arithmetic number, because the mean of its divisors is an integer number (220821806949).

Almost surely, 2^441643613897 is an apocalyptic number.

It is an amenable number.

441643613897 is a deficient number, since it is larger than the sum of its proper divisors (1).

441643613897 is an equidigital number, since it uses as much as digits as its factorization.

441643613897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 56.

The spelling of 441643613897 in words is "four hundred forty-one billion, six hundred forty-three million, six hundred thirteen thousand, eight hundred ninety-seven".