99569664 has 156 divisors (see below), whose sum is σ = 299430196. Its totient is φ = 31850496.

The previous prime is 99569653. The next prime is 99569681. The reversal of 99569664 is 46696599.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74649600 + 24920064 = 8640^2 + 4992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 99569664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1363932 + ... + 1364004.

Almost surely, 2^99569664 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 99569664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149715098).

99569664 is an abundant number, since it is smaller than the sum of its proper divisors (199860532).

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

99569664 is a wasteful number, since it uses less digits than its factorization.

99569664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 115 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 99569664 is about 9978.4600014231. The cubic root of 99569664 is about 463.4921117344.

The spelling of 99569664 in words is "ninety-nine million, five hundred sixty-nine thousand, six hundred sixty-four".