320216680787 has 2 divisors, whose sum is σ = 320216680788. Its totient is φ = 320216680786.

The previous prime is 320216680759. The next prime is 320216680807. The reversal of 320216680787 is 787086612023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320216680787 - 2³⁰ = 319142938963 is a prime.

It is not a weakly prime, because it can be changed into another prime (320216680727) 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, 160108340393 + 160108340394.

It is an arithmetic number, because the mean of its divisors is an integer number (160108340394).

Almost surely, 2^320216680787 is an apocalyptic number.

320216680787 is a deficient number, since it is larger than the sum of its proper divisors (1).

320216680787 is an equidigital number, since it uses as much as digits as its factorization.

320216680787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 320216680787 in words is "three hundred twenty billion, two hundred sixteen million, six hundred eighty thousand, seven hundred eighty-seven".