806895348221 has 2 divisors, whose sum is σ = 806895348222. Its totient is φ = 806895348220.

The previous prime is 806895348211. The next prime is 806895348239. The reversal of 806895348221 is 122843598608.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715697388121 + 91197960100 = 845989^2 + 301990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806895348221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806895348211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403447674110 + 403447674111.

It is an arithmetic number, because the mean of its divisors is an integer number (403447674111).

Almost surely, 2^806895348221 is an apocalyptic number.

It is an amenable number.

806895348221 is a deficient number, since it is larger than the sum of its proper divisors (1).

806895348221 is an equidigital number, since it uses as much as digits as its factorization.

806895348221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 806895348221 in words is "eight hundred six billion, eight hundred ninety-five million, three hundred forty-eight thousand, two hundred twenty-one".