98691619689 has 18 divisors (see below), whose sum is σ = 154363817790. Its totient is φ = 60733303488.

The previous prime is 98691619673. The next prime is 98691619693.

98691619689 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 6948056025 + 91743563664 = 83355^2 + 302892^2 .

It is not a de Polignac number, because 98691619689 - 2⁴ = 98691619673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98691619589) 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 in 17 ways as a sum of consecutive naturals, for example, 32441484 + ... + 32444525.

It is an arithmetic number, because the mean of its divisors is an integer number (8575767655).

Almost surely, 2^98691619689 is an apocalyptic number.

It is an amenable number.

98691619689 is a deficient number, since it is larger than the sum of its proper divisors (55672198101).

98691619689 is a wasteful number, since it uses less digits than its factorization.

98691619689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64886041 (or 64886025 counting only the distinct ones).

The product of its digits is 90699264, while the sum is 72.

The spelling of 98691619689 in words is "ninety-eight billion, six hundred ninety-one million, six hundred nineteen thousand, six hundred eighty-nine".