98065661081 has 2 divisors, whose sum is σ = 98065661082. Its totient is φ = 98065661080.

The previous prime is 98065661047. The next prime is 98065661093. The reversal of 98065661081 is 18016656089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57033081856 + 41032579225 = 238816^2 + 202565^2 .

It is an emirp because it is prime and its reverse (18016656089) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98065661081 - 2²² = 98061466777 is a prime.

It is a super-2 number, since 2×98065661081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98065661581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49032830540 + 49032830541.

It is an arithmetic number, because the mean of its divisors is an integer number (49032830541).

Almost surely, 2^98065661081 is an apocalyptic number.

It is an amenable number.

98065661081 is a deficient number, since it is larger than the sum of its proper divisors (1).

98065661081 is an equidigital number, since it uses as much as digits as its factorization.

98065661081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 98065661081 in words is "ninety-eight billion, sixty-five million, six hundred sixty-one thousand, eighty-one".