785393940017 has 2 divisors, whose sum is σ = 785393940018. Its totient is φ = 785393940016.

The previous prime is 785393940013. The next prime is 785393940077. The reversal of 785393940017 is 710049393587.

785393940017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713355916816 + 72038023201 = 844604^2 + 268399^2 .

It is a cyclic number.

It is not a de Polignac number, because 785393940017 - 2² = 785393940013 is a prime.

It is not a weakly prime, because it can be changed into another prime (785393940013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392696970008 + 392696970009.

It is an arithmetic number, because the mean of its divisors is an integer number (392696970009).

Almost surely, 2^785393940017 is an apocalyptic number.

It is an amenable number.

785393940017 is a deficient number, since it is larger than the sum of its proper divisors (1).

785393940017 is an equidigital number, since it uses as much as digits as its factorization.

785393940017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 785393940017 in words is "seven hundred eighty-five billion, three hundred ninety-three million, nine hundred forty thousand, seventeen".