99569567988 has 144 divisors (see below), whose sum is σ = 283884636672. Its totient is φ = 29152224000.

The previous prime is 99569567971. The next prime is 99569567989. The reversal of 99569567988 is 88976596599.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99569567989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8010018 + ... + 8022438.

It is an arithmetic number, because the mean of its divisors is an integer number (1971421088).

Almost surely, 2^99569567988 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 99569567988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141942318336).

99569567988 is an abundant number, since it is smaller than the sum of its proper divisors (184315068684).

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

99569567988 is a wasteful number, since it uses less digits than its factorization.

99569567988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13126 (or 13121 counting only the distinct ones).

The product of its digits is 2645395200, while the sum is 81.

The spelling of 99569567988 in words is "ninety-nine billion, five hundred sixty-nine million, five hundred sixty-seven thousand, nine hundred eighty-eight".