98711585809 has 2 divisors, whose sum is σ = 98711585810. Its totient is φ = 98711585808.

The previous prime is 98711585783. The next prime is 98711585857. The reversal of 98711585809 is 90858511789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78090625809 + 20620960000 = 279447^2 + 143600^2 .

It is a cyclic number.

It is not a de Polignac number, because 98711585809 - 2¹³ = 98711577617 is a prime.

It is not a weakly prime, because it can be changed into another prime (98711585879) 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, 49355792904 + 49355792905.

It is an arithmetic number, because the mean of its divisors is an integer number (49355792905).

Almost surely, 2^98711585809 is an apocalyptic number.

It is an amenable number.

98711585809 is a deficient number, since it is larger than the sum of its proper divisors (1).

98711585809 is an equidigital number, since it uses as much as digits as its factorization.

98711585809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 61.

The spelling of 98711585809 in words is "ninety-eight billion, seven hundred eleven million, five hundred eighty-five thousand, eight hundred nine".