8659998144 has 448 divisors, whose sum is σ = 31292800000. Its totient is φ = 2341011456.

The previous prime is 8659998143. The next prime is 8659998167. The reversal of 8659998144 is 4418999568.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8659998143) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 11260992 + ... + 11261760.

It is an arithmetic number, because the mean of its divisors is an integer number (69850000).

Almost surely, 2^8659998144 is an apocalyptic number.

8659998144 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8659998144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15646400000).

8659998144 is an abundant number, since it is smaller than the sum of its proper divisors (22632801856).

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

8659998144 is a wasteful number, since it uses less digits than its factorization.

8659998144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 800 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The square root of 8659998144 is about 93059.1110208990. Note that the first 3 decimals coincide. The cubic root of 8659998144 is about 2053.5530802469.

The spelling of 8659998144 in words is "eight billion, six hundred fifty-nine million, nine hundred ninety-eight thousand, one hundred forty-four".