985732260135809 has 2 divisors, whose sum is σ = 985732260135810. Its totient is φ = 985732260135808.

The previous prime is 985732260135787. The next prime is 985732260135829. The reversal of 985732260135809 is 908531062237589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 596198288477584 + 389533971658225 = 24417172^2 + 19736615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985732260135809 is a prime.

It is not a weakly prime, because it can be changed into another prime (985732260135829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492866130067904 + 492866130067905.

It is an arithmetic number, because the mean of its divisors is an integer number (492866130067905).

Almost surely, 2^{985732260135809} is an apocalyptic number.

It is an amenable number.

985732260135809 is a deficient number, since it is larger than the sum of its proper divisors (1).

985732260135809 is an equidigital number, since it uses as much as digits as its factorization.

985732260135809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 195955200, while the sum is 68.

The spelling of 985732260135809 in words is "nine hundred eighty-five trillion, seven hundred thirty-two billion, two hundred sixty million, one hundred thirty-five thousand, eight hundred nine".