9873387699840 has 3072 divisors, whose sum is σ = 44186204160000. Its totient is φ = 2081191698432.

The previous prime is 9873387699839. The next prime is 9873387699893. The reversal of 9873387699840 is 489967833789.

9873387699840 is a `hidden beast` number, since 9 + 8 + 73 + 387 + 6 + 99 + 84 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 9873387699840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 147363995487 + ... + 147363995553.

It is an arithmetic number, because the mean of its divisors is an integer number (14383530000).

Almost surely, 2^{9873387699840} is an apocalyptic number.

9873387699840 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 9873387699840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22093102080000).

9873387699840 is an abundant number, since it is smaller than the sum of its proper divisors (34312816460160).

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

9873387699840 is a wasteful number, since it uses less digits than its factorization.

9873387699840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 3950456832, while the sum is 81.

The spelling of 9873387699840 in words is "nine trillion, eight hundred seventy-three billion, three hundred eighty-seven million, six hundred ninety-nine thousand, eight hundred forty".