822303778649 has 2 divisors, whose sum is σ = 822303778650. Its totient is φ = 822303778648.

The previous prime is 822303778589. The next prime is 822303778657. The reversal of 822303778649 is 946877303228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431044771600 + 391259007049 = 656540^2 + 625507^2 .

It is a cyclic number.

It is not a de Polignac number, because 822303778649 - 2¹⁶ = 822303713113 is a prime.

It is not a weakly prime, because it can be changed into another prime (822303772649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411151889324 + 411151889325.

It is an arithmetic number, because the mean of its divisors is an integer number (411151889325).

Almost surely, 2^822303778649 is an apocalyptic number.

It is an amenable number.

822303778649 is a deficient number, since it is larger than the sum of its proper divisors (1).

822303778649 is an equidigital number, since it uses as much as digits as its factorization.

822303778649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 59.

The spelling of 822303778649 in words is "eight hundred twenty-two billion, three hundred three million, seven hundred seventy-eight thousand, six hundred forty-nine".