9643898880 has 960 divisors, whose sum is σ = 43381578240. Its totient is φ = 1990656000.

The previous prime is 9643898861. The next prime is 9643898897. The reversal of 9643898880 is 888983469.

It is a tau number, because it is divible by the number of its divisors (960).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 63866805 + ... + 63866955.

It is an arithmetic number, because the mean of its divisors is an integer number (45189144).

Almost surely, 2^9643898880 is an apocalyptic number.

9643898880 is a gapful number since it is divisible by the number (90) 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 9643898880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21690789120).

9643898880 is an abundant number, since it is smaller than the sum of its proper divisors (33737679360).

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

9643898880 is a wasteful number, since it uses less digits than its factorization.

9643898880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The square root of 9643898880 is about 98203.3547288482. The cubic root of 9643898880 is about 2128.5517630036.

The spelling of 9643898880 in words is "nine billion, six hundred forty-three million, eight hundred ninety-eight thousand, eight hundred eighty".