85802026909 has 2 divisors, whose sum is σ = 85802026910. Its totient is φ = 85802026908.

The previous prime is 85802026873. The next prime is 85802026943. The reversal of 85802026909 is 90962020858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74050382884 + 11751644025 = 272122^2 + 108405^2 .

It is a cyclic number.

It is not a de Polignac number, because 85802026909 - 2⁹ = 85802026397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85802026979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42901013454 + 42901013455.

It is an arithmetic number, because the mean of its divisors is an integer number (42901013455).

Almost surely, 2^85802026909 is an apocalyptic number.

It is an amenable number.

85802026909 is a deficient number, since it is larger than the sum of its proper divisors (1).

85802026909 is an equidigital number, since it uses as much as digits as its factorization.

85802026909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 85802026909 in words is "eighty-five billion, eight hundred two million, twenty-six thousand, nine hundred nine".