9986643516 has 24 divisors (see below), whose sum is σ = 24315306624. Its totient is φ = 3184147120.

The previous prime is 9986643503. The next prime is 9986643517. The reversal of 9986643516 is 6153466899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986643517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18091470 + ... + 18092021.

It is an arithmetic number, because the mean of its divisors is an integer number (1013137776).

Almost surely, 2^9986643516 is an apocalyptic number.

It is an amenable number.

9986643516 is an abundant number, since it is smaller than the sum of its proper divisors (14328663108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9986643516 is a wasteful number, since it uses less digits than its factorization.

9986643516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36183521 (or 36183519 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 57.

The square root of 9986643516 is about 99933.1952656373. The cubic root of 9986643516 is about 2153.4750735861.

The spelling of 9986643516 in words is "nine billion, nine hundred eighty-six million, six hundred forty-three thousand, five hundred sixteen".