320404342457 has 2 divisors, whose sum is σ = 320404342458. Its totient is φ = 320404342456.

The previous prime is 320404342441. The next prime is 320404342477. The reversal of 320404342457 is 754243404023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261873733696 + 58530608761 = 511736^2 + 241931^2 .

It is a cyclic number.

It is not a de Polignac number, because 320404342457 - 2⁴ = 320404342441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320404342457.

It is not a weakly prime, because it can be changed into another prime (320404342477) 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, 160202171228 + 160202171229.

It is an arithmetic number, because the mean of its divisors is an integer number (160202171229).

Almost surely, 2^320404342457 is an apocalyptic number.

It is an amenable number.

320404342457 is a deficient number, since it is larger than the sum of its proper divisors (1).

320404342457 is an equidigital number, since it uses as much as digits as its factorization.

320404342457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 38.

The spelling of 320404342457 in words is "three hundred twenty billion, four hundred four million, three hundred forty-two thousand, four hundred fifty-seven".