9999573423840 has 1152 divisors, whose sum is σ = 47294381481984. Its totient is φ = 1856120832000.

The previous prime is 9999573423781. The next prime is 9999573423859. The reversal of 9999573423840 is 483243759999.

9999573423840 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 573 + 4 + 2 + 3 + 8 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 44572750 + ... + 44796530.

It is an arithmetic number, because the mean of its divisors is an integer number (41054150592).

Almost surely, 2^{9999573423840} is an apocalyptic number.

9999573423840 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 9999573423840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23647190740992).

9999573423840 is an abundant number, since it is smaller than the sum of its proper divisors (37294808058144).

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

9999573423840 is a wasteful number, since it uses less digits than its factorization.

9999573423840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223864 (or 223853 counting only the distinct ones).

The product of its (nonzero) digits is 529079040, while the sum is 72.

The spelling of 9999573423840 in words is "nine trillion, nine hundred ninety-nine billion, five hundred seventy-three million, four hundred twenty-three thousand, eight hundred forty".