850919485217 has 2 divisors, whose sum is σ = 850919485218. Its totient is φ = 850919485216.

The previous prime is 850919485189. The next prime is 850919485289. The reversal of 850919485217 is 712584919058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744727576576 + 106191908641 = 862976^2 + 325871^2 .

It is a cyclic number.

It is not a de Polignac number, because 850919485217 - 2⁶ = 850919485153 is a prime.

It is not a weakly prime, because it can be changed into another prime (850919487217) 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, 425459742608 + 425459742609.

It is an arithmetic number, because the mean of its divisors is an integer number (425459742609).

Almost surely, 2^850919485217 is an apocalyptic number.

It is an amenable number.

850919485217 is a deficient number, since it is larger than the sum of its proper divisors (1).

850919485217 is an equidigital number, since it uses as much as digits as its factorization.

850919485217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 59.

The spelling of 850919485217 in words is "eight hundred fifty billion, nine hundred nineteen million, four hundred eighty-five thousand, two hundred seventeen".