1109920969728 has 176 divisors, whose sum is σ = 3320944063360. Its totient is φ = 366158610432.

The previous prime is 1109920969727. The next prime is 1109920969733. The reversal of 1109920969728 is 8279690299011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109920969721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2474925 + ... + 2888787.

It is an arithmetic number, because the mean of its divisors is an integer number (18869000360).

Almost surely, 2^{1109920969728} is an apocalyptic number.

1109920969728 is a gapful number since it is divisible by the number (18) 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 1109920969728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660472031680).

1109920969728 is an abundant number, since it is smaller than the sum of its proper divisors (2211023093632).

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

1109920969728 is an equidigital number, since it uses as much as digits as its factorization.

1109920969728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413989 (or 413965 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 1109920969728 in words is "one trillion, one hundred nine billion, nine hundred twenty million, nine hundred sixty-nine thousand, seven hundred twenty-eight".