1109817917688 has 128 divisors (see below), whose sum is σ = 3026327040000. Its totient is φ = 337984762752.

The previous prime is 1109817917641. The next prime is 1109817917743. The reversal of 1109817917688 is 8867197189011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1190803 + ... + 1907261.

It is an arithmetic number, because the mean of its divisors is an integer number (23643180000).

Almost surely, 2^{1109817917688} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109817917688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513163520000).

1109817917688 is an abundant number, since it is smaller than the sum of its proper divisors (1916509122312).

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

1109817917688 is a wasteful number, since it uses less digits than its factorization.

1109817917688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716609 (or 716605 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 66.

The spelling of 1109817917688 in words is "one trillion, one hundred nine billion, eight hundred seventeen million, nine hundred seventeen thousand, six hundred eighty-eight".