99886981115689 has 2 divisors, whose sum is σ = 99886981115690. Its totient is φ = 99886981115688.

The previous prime is 99886981115633. The next prime is 99886981115737. The reversal of 99886981115689 is 98651118968899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65139103974400 + 34747877141289 = 8070880^2 + 5894733^2 .

It is a cyclic number.

It is not a de Polignac number, because 99886981115689 - 2²¹ = 99886979018537 is a prime.

It is not a weakly prime, because it can be changed into another prime (99886981115989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49943490557844 + 49943490557845.

It is an arithmetic number, because the mean of its divisors is an integer number (49943490557845).

Almost surely, 2^{99886981115689} is an apocalyptic number.

It is an amenable number.

99886981115689 is a deficient number, since it is larger than the sum of its proper divisors (1).

99886981115689 is an equidigital number, since it uses as much as digits as its factorization.

99886981115689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4837294080, while the sum is 88.

The spelling of 99886981115689 in words is "ninety-nine trillion, eight hundred eighty-six billion, nine hundred eighty-one million, one hundred fifteen thousand, six hundred eighty-nine".