9644998964040 has 576 divisors, whose sum is σ = 36053995461120. Its totient is φ = 2231736883200.

The previous prime is 9644998963993. The next prime is 9644998964047. The reversal of 9644998964040 is 404698994469.

9644998964040 is a `hidden beast` number, since 9 + 6 + 4 + 49 + 98 + 96 + 404 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 9644998964040.

It is not an unprimeable number, because it can be changed into a prime (9644998964047) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 98527359 + ... + 98625201.

It is an arithmetic number, because the mean of its divisors is an integer number (62593742120).

Almost surely, 2^{9644998964040} is an apocalyptic number.

9644998964040 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 9644998964040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18026997730560).

9644998964040 is an abundant number, since it is smaller than the sum of its proper divisors (26408996497080).

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

9644998964040 is a wasteful number, since it uses less digits than its factorization.

9644998964040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97986 (or 97968 counting only the distinct ones).

The product of its (nonzero) digits is 483729408, while the sum is 72.

The spelling of 9644998964040 in words is "nine trillion, six hundred forty-four billion, nine hundred ninety-eight million, nine hundred sixty-four thousand, forty".