320785686381707 has 2 divisors, whose sum is σ = 320785686381708. Its totient is φ = 320785686381706.

The previous prime is 320785686381679. The next prime is 320785686381749. The reversal of 320785686381707 is 707183686587023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320785686381707 - 2¹⁰ = 320785686380683 is a prime.

It is not a weakly prime, because it can be changed into another prime (320785686381007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160392843190853 + 160392843190854.

It is an arithmetic number, because the mean of its divisors is an integer number (160392843190854).

Almost surely, 2^{320785686381707} is an apocalyptic number.

320785686381707 is a deficient number, since it is larger than the sum of its proper divisors (1).

320785686381707 is an equidigital number, since it uses as much as digits as its factorization.

320785686381707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 568995840, while the sum is 71.

The spelling of 320785686381707 in words is "three hundred twenty trillion, seven hundred eighty-five billion, six hundred eighty-six million, three hundred eighty-one thousand, seven hundred seven".