19660782785280 has 1152 divisors, whose sum is σ = 78976094238720. Its totient is φ = 4057753190400.

The previous prime is 19660782785243. The next prime is 19660782785299. The reversal of 19660782785280 is 8258728706691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7019199880 + ... + 7019202680.

It is an arithmetic number, because the mean of its divisors is an integer number (68555637360).

Almost surely, 2^{19660782785280} is an apocalyptic number.

19660782785280 is a gapful number since it is divisible by the number (10) 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 19660782785280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39488047119360).

19660782785280 is an abundant number, since it is smaller than the sum of its proper divisors (59315311453440).

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

19660782785280 is a wasteful number, since it uses less digits than its factorization.

19660782785280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 69.

The spelling of 19660782785280 in words is "nineteen trillion, six hundred sixty billion, seven hundred eighty-two million, seven hundred eighty-five thousand, two hundred eighty".