9898216564 has 12 divisors (see below), whose sum is σ = 17324656804. Its totient is φ = 4948314624.

The previous prime is 9898216547. The next prime is 9898216583. The reversal of 9898216564 is 4656128989.

It can be written as a sum of positive squares in 2 ways, for example, as 2464328164 + 7433888400 = 49642^2 + 86220^2 .

It is a super-2 number, since 2×9898216564² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9898216499 and 9898216508.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 169899 + ... + 220594.

Almost surely, 2^9898216564 is an apocalyptic number.

It is an amenable number.

9898216564 is a deficient number, since it is larger than the sum of its proper divisors (7426440240).

9898216564 is a wasteful number, since it uses less digits than its factorization.

9898216564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396834 (or 396832 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The square root of 9898216564 is about 99489.7812039005. The cubic root of 9898216564 is about 2147.1002237066.

The spelling of 9898216564 in words is "nine billion, eight hundred ninety-eight million, two hundred sixteen thousand, five hundred sixty-four".