16617718109020 has 192 divisors, whose sum is σ = 44603016192000. Its totient is φ = 5070656941056.

The previous prime is 16617718109009. The next prime is 16617718109029. The reversal of 16617718109020 is 2090181771661.

It is a super-2 number, since 2×16617718109020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16617718109029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56940 + ... + 5765299.

It is an arithmetic number, because the mean of its divisors is an integer number (232307376000).

Almost surely, 2^{16617718109020} is an apocalyptic number.

16617718109020 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 16617718109020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22301508096000).

16617718109020 is an abundant number, since it is smaller than the sum of its proper divisors (27985298082980).

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

16617718109020 is a wasteful number, since it uses less digits than its factorization.

16617718109020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822340 (or 5822338 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

The spelling of 16617718109020 in words is "sixteen trillion, six hundred seventeen billion, seven hundred eighteen million, one hundred nine thousand, twenty".