320760282545621 has 2 divisors, whose sum is σ = 320760282545622. Its totient is φ = 320760282545620.

The previous prime is 320760282545587. The next prime is 320760282545669. The reversal of 320760282545621 is 126545282067023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310271843266225 + 10488439279396 = 17614535^2 + 3238586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320760282545621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320760282545671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160380141272810 + 160380141272811.

It is an arithmetic number, because the mean of its divisors is an integer number (160380141272811).

Almost surely, 2^{320760282545621} is an apocalyptic number.

It is an amenable number.

320760282545621 is a deficient number, since it is larger than the sum of its proper divisors (1).

320760282545621 is an equidigital number, since it uses as much as digits as its factorization.

320760282545621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 320760282545621 in words is "three hundred twenty trillion, seven hundred sixty billion, two hundred eighty-two million, five hundred forty-five thousand, six hundred twenty-one".