1109847805920 has 576 divisors, whose sum is σ = 4426367347584. Its totient is φ = 247973806080.

The previous prime is 1109847805909. The next prime is 1109847805943. The reversal of 1109847805920 is 295087489011.

It is a happy number.

1109847805920 is a `hidden beast` number, since 1 + 1 + 0 + 9 + 8 + 47 + 8 + 0 + 592 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 150117744 + ... + 150125136.

It is an arithmetic number, because the mean of its divisors is an integer number (7684665534).

Almost surely, 2^{1109847805920} is an apocalyptic number.

1109847805920 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 1109847805920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213183673792).

1109847805920 is an abundant number, since it is smaller than the sum of its proper divisors (3316519541664).

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

1109847805920 is a wasteful number, since it uses less digits than its factorization.

1109847805920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7755 (or 7744 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 1109847805920 in words is "one trillion, one hundred nine billion, eight hundred forty-seven million, eight hundred five thousand, nine hundred twenty".