320543246550641 has 2 divisors, whose sum is σ = 320543246550642. Its totient is φ = 320543246550640.

The previous prime is 320543246550601. The next prime is 320543246550679. The reversal of 320543246550641 is 146055642345023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163960444527616 + 156582802023025 = 12804704^2 + 12513305^2 .

It is an emirp because it is prime and its reverse (146055642345023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320543246550641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320543246550641.

It is not a weakly prime, because it can be changed into another prime (320543246550601) 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, 160271623275320 + 160271623275321.

It is an arithmetic number, because the mean of its divisors is an integer number (160271623275321).

Almost surely, 2^{320543246550641} is an apocalyptic number.

It is an amenable number.

320543246550641 is a deficient number, since it is larger than the sum of its proper divisors (1).

320543246550641 is an equidigital number, since it uses as much as digits as its factorization.

320543246550641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368000, while the sum is 50.

Adding to 320543246550641 its reverse (146055642345023), we get a palindrome (466598888895664).

The spelling of 320543246550641 in words is "three hundred twenty trillion, five hundred forty-three billion, two hundred forty-six million, five hundred fifty thousand, six hundred forty-one".