98861816889 has 36 divisors (see below), whose sum is σ = 161204718948. Its totient is φ = 58296870720.

The previous prime is 98861816839. The next prime is 98861816917.

It is a happy number.

98861816889 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 86647809600 + 12214007289 = 294360^2 + 110517^2 .

It is not a de Polignac number, because 98861816889 - 2⁷ = 98861816761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98861816839) 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 in 35 ways as a sum of consecutive naturals, for example, 1186494 + ... + 1267079.

Almost surely, 2^98861816889 is an apocalyptic number.

98861816889 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

98861816889 is a deficient number, since it is larger than the sum of its proper divisors (62342902059).

98861816889 is a wasteful number, since it uses less digits than its factorization.

98861816889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453638 (or 2453624 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 72.

The spelling of 98861816889 in words is "ninety-eight billion, eight hundred sixty-one million, eight hundred sixteen thousand, eight hundred eighty-nine".