320301268768781 has 2 divisors, whose sum is σ = 320301268768782. Its totient is φ = 320301268768780.

The previous prime is 320301268768729. The next prime is 320301268768837. The reversal of 320301268768781 is 187867862103023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318903128063881 + 1398140704900 = 17857859^2 + 1182430^2 .

It is a cyclic number.

It is not a de Polignac number, because 320301268768781 - 2¹⁰ = 320301268767757 is a prime.

It is a super-2 number, since 2×320301268768781² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320301268708781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160150634384390 + 160150634384391.

It is an arithmetic number, because the mean of its divisors is an integer number (160150634384391).

Almost surely, 2^{320301268768781} is an apocalyptic number.

It is an amenable number.

320301268768781 is a deficient number, since it is larger than the sum of its proper divisors (1).

320301268768781 is an equidigital number, since it uses as much as digits as its factorization.

320301268768781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 320301268768781 in words is "three hundred twenty trillion, three hundred one billion, two hundred sixty-eight million, seven hundred sixty-eight thousand, seven hundred eighty-one".