806414578217 has 2 divisors, whose sum is σ = 806414578218. Its totient is φ = 806414578216.

The previous prime is 806414578213. The next prime is 806414578273. The reversal of 806414578217 is 712875414608.

806414578217 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., 591182605456 + 215231972761 = 768884^2 + 463931^2 .

It is a cyclic number.

It is not a de Polignac number, because 806414578217 - 2² = 806414578213 is a prime.

It is not a weakly prime, because it can be changed into another prime (806414578213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403207289108 + 403207289109.

It is an arithmetic number, because the mean of its divisors is an integer number (403207289109).

Almost surely, 2^806414578217 is an apocalyptic number.

It is an amenable number.

806414578217 is a deficient number, since it is larger than the sum of its proper divisors (1).

806414578217 is an equidigital number, since it uses as much as digits as its factorization.

806414578217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 806414578217 in words is "eight hundred six billion, four hundred fourteen million, five hundred seventy-eight thousand, two hundred seventeen".