9902565568 has 56 divisors (see below), whose sum is σ = 22595547392. Its totient is φ = 4217889024.

The previous prime is 9902565557. The next prime is 9902565619. The reversal of 9902565568 is 8655652099.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5221 + ... + 140827.

Almost surely, 2^9902565568 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 9902565568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11297773696).

9902565568 is an abundant number, since it is smaller than the sum of its proper divisors (12692981824).

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

9902565568 is a wasteful number, since it uses less digits than its factorization.

9902565568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135789 (or 135779 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 55.

The square root of 9902565568 is about 99511.6353397933. The cubic root of 9902565568 is about 2147.4146365827.

The spelling of 9902565568 in words is "nine billion, nine hundred two million, five hundred sixty-five thousand, five hundred sixty-eight".