98711585857 has 2 divisors, whose sum is σ = 98711585858. Its totient is φ = 98711585856.

The previous prime is 98711585809. The next prime is 98711585879. The reversal of 98711585857 is 75858511789.

It is a Cunningham number, because it is equal to 314184²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98711585856 + 1 = 314184^2 + 1^2 .

It is an emirp because it is prime and its reverse (75858511789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98711585857 - 2²⁷ = 98577368129 is a prime.

It is not a weakly prime, because it can be changed into another prime (98711585897) 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, 49355792928 + 49355792929.

It is an arithmetic number, because the mean of its divisors is an integer number (49355792929).

Almost surely, 2^98711585857 is an apocalyptic number.

It is an amenable number.

98711585857 is a deficient number, since it is larger than the sum of its proper divisors (1).

98711585857 is an equidigital number, since it uses as much as digits as its factorization.

98711585857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224000, while the sum is 64.

The spelling of 98711585857 in words is "ninety-eight billion, seven hundred eleven million, five hundred eighty-five thousand, eight hundred fifty-seven".