849446095721 has 2 divisors, whose sum is σ = 849446095722. Its totient is φ = 849446095720.

The previous prime is 849446095709. The next prime is 849446095739. The reversal of 849446095721 is 127590644948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733549425625 + 115896670096 = 856475^2 + 340436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-849446095721 is a prime.

It is not a weakly prime, because it can be changed into another prime (849446005721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424723047860 + 424723047861.

It is an arithmetic number, because the mean of its divisors is an integer number (424723047861).

Almost surely, 2^849446095721 is an apocalyptic number.

It is an amenable number.

849446095721 is a deficient number, since it is larger than the sum of its proper divisors (1).

849446095721 is an equidigital number, since it uses as much as digits as its factorization.

849446095721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 849446095721 in words is "eight hundred forty-nine billion, four hundred forty-six million, ninety-five thousand, seven hundred twenty-one".