9644305680 has 60 divisors (see below), whose sum is σ = 32388795660. Its totient is φ = 2571814656.

The previous prime is 9644305669. The next prime is 9644305709. The reversal of 9644305680 is 865034469.

9644305680 is a `hidden beast` number, since 96 + 4 + 430 + 56 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4549772304 + 5094533376 = 67452^2 + 71376^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6696715 + ... + 6698154.

It is an arithmetic number, because the mean of its divisors is an integer number (539813261).

Almost surely, 2^9644305680 is an apocalyptic number.

9644305680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9644305680 is an abundant number, since it is smaller than the sum of its proper divisors (22744489980).

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

9644305680 is a wasteful number, since it uses less digits than its factorization.

9644305680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13394888 (or 13394879 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 9644305680 is about 98205.4259193452. The cubic root of 9644305680 is about 2128.5816915174.

The spelling of 9644305680 in words is "nine billion, six hundred forty-four million, three hundred five thousand, six hundred eighty".