57585221809 has 2 divisors, whose sum is σ = 57585221810. Its totient is φ = 57585221808.

The previous prime is 57585221753. The next prime is 57585221821. The reversal of 57585221809 is 90812258575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52709272225 + 4875949584 = 229585^2 + 69828^2 .

It is a cyclic number.

It is not a de Polignac number, because 57585221809 - 2¹⁵ = 57585189041 is a prime.

It is not a weakly prime, because it can be changed into another prime (57585221849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28792610904 + 28792610905.

It is an arithmetic number, because the mean of its divisors is an integer number (28792610905).

Almost surely, 2^57585221809 is an apocalyptic number.

It is an amenable number.

57585221809 is a deficient number, since it is larger than the sum of its proper divisors (1).

57585221809 is an equidigital number, since it uses as much as digits as its factorization.

57585221809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 52.

The spelling of 57585221809 in words is "fifty-seven billion, five hundred eighty-five million, two hundred twenty-one thousand, eight hundred nine".