9655686881280 has 1792 divisors, whose sum is σ = 38999613542400. Its totient is φ = 2274125414400.

The previous prime is 9655686881251. The next prime is 9655686881299. The reversal of 9655686881280 is 821886865569.

9655686881280 is a `hidden beast` number, since 9 + 6 + 556 + 8 + 68 + 8 + 1 + 2 + 8 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 9655686881199 and 9655686881208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40400363401 + ... + 40400363639.

It is an arithmetic number, because the mean of its divisors is an integer number (21763177200).

Almost surely, 2^{9655686881280} is an apocalyptic number.

9655686881280 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 9655686881280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19499806771200).

9655686881280 is an abundant number, since it is smaller than the sum of its proper divisors (29343926661120).

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

9655686881280 is an equidigital number, since it uses as much as digits as its factorization.

9655686881280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 398131200, while the sum is 72.

The spelling of 9655686881280 in words is "nine trillion, six hundred fifty-five billion, six hundred eighty-six million, eight hundred eighty-one thousand, two hundred eighty".