9899937564 has 96 divisors (see below), whose sum is σ = 26567364096. Its totient is φ = 2839879680.

The previous prime is 9899937529. The next prime is 9899937569. The reversal of 9899937564 is 4657399989.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899937569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277684 + ... + 311300.

It is an arithmetic number, because the mean of its divisors is an integer number (276743376).

Almost surely, 2^9899937564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9899937564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13283682048).

9899937564 is an abundant number, since it is smaller than the sum of its proper divisors (16667426532).

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

9899937564 is a wasteful number, since it uses less digits than its factorization.

With its successor (9899937565) it forms an eRAP, since the sums of their prime factors are consecutive (33755 and 33756).

9899937564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33755 (or 33753 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 69.

The square root of 9899937564 is about 99498.4299574621. The cubic root of 9899937564 is about 2147.2246550566.

The spelling of 9899937564 in words is "nine billion, eight hundred ninety-nine million, nine hundred thirty-seven thousand, five hundred sixty-four".