16809549322368 has 512 divisors, whose sum is σ = 51091679232000. Its totient is φ = 4850270208000.

The previous prime is 16809549322273. The next prime is 16809549322421. The reversal of 16809549322368 is 86322394590861.

It is a super-2 number, since 2×16809549322368² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 16809549322299 and 16809549322308.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5513133708 + ... + 5513136756.

It is an arithmetic number, because the mean of its divisors is an integer number (99788436000).

Almost surely, 2^{16809549322368} 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 16809549322368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25545839616000).

16809549322368 is an abundant number, since it is smaller than the sum of its proper divisors (34282129909632).

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

16809549322368 is a wasteful number, since it uses less digits than its factorization.

16809549322368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 66.

The spelling of 16809549322368 in words is "sixteen trillion, eight hundred nine billion, five hundred forty-nine million, three hundred twenty-two thousand, three hundred sixty-eight".