9566871399936 has 560 divisors, whose sum is σ = 30397458500640. Its totient is φ = 3000137564160.

The previous prime is 9566871399829. The next prime is 9566871399937. The reversal of 9566871399936 is 6399931786659.

9566871399936 is a `hidden beast` number, since 9 + 5 + 66 + 87 + 1 + 399 + 93 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9566871399937) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 523657810 + ... + 523676078.

It is an arithmetic number, because the mean of its divisors is an integer number (54281175894).

Almost surely, 2^{9566871399936} is an apocalyptic number.

9566871399936 is a gapful number since it is divisible by the number (96) 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 9566871399936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15198729250320).

9566871399936 is an abundant number, since it is smaller than the sum of its proper divisors (20830587100704).

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

9566871399936 is an equidigital number, since it uses as much as digits as its factorization.

9566871399936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18389 (or 18358 counting only the distinct ones).

The product of its digits is 3571283520, while the sum is 81.

The spelling of 9566871399936 in words is "nine trillion, five hundred sixty-six billion, eight hundred seventy-one million, three hundred ninety-nine thousand, nine hundred thirty-six".