98888888888861 has 2 divisors, whose sum is σ = 98888888888862. Its totient is φ = 98888888888860.

The previous prime is 98888888888831. The next prime is 98888888888939. The reversal of 98888888888861 is 16888888888889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96112729764100 + 2776159124761 = 9803710^2 + 1666181^2 .

It is a cyclic number.

It is not a de Polignac number, because 98888888888861 - 2²² = 98888884694557 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98888888888831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49444444444430 + 49444444444431.

It is an arithmetic number, because the mean of its divisors is an integer number (49444444444431).

Almost surely, 2^{98888888888861} is an apocalyptic number.

It is an amenable number.

98888888888861 is a deficient number, since it is larger than the sum of its proper divisors (1).

98888888888861 is an equidigital number, since it uses as much as digits as its factorization.

98888888888861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 463856467968, while the sum is 104.

The spelling of 98888888888861 in words is "ninety-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-one".