22194679921128 has 320 divisors, whose sum is σ = 73067106309120. Its totient is φ = 6205468838400.

The previous prime is 22194679921109. The next prime is 22194679921163. The reversal of 22194679921128 is 82112997649122.

22194679921128 is a `hidden beast` number, since 2 + 21 + 9 + 467 + 9 + 9 + 21 + 128 = 666.

It is a Cunningham number, because it is equal to 4711123²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 207235833 + ... + 207342903.

It is an arithmetic number, because the mean of its divisors is an integer number (228334707216).

Almost surely, 2^{22194679921128} 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 22194679921128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36533553154560).

22194679921128 is an abundant number, since it is smaller than the sum of its proper divisors (50872426387992).

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

22194679921128 is a wasteful number, since it uses less digits than its factorization.

22194679921128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109350 (or 109337 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 22194679921128 in words is "twenty-two trillion, one hundred ninety-four billion, six hundred seventy-nine million, nine hundred twenty-one thousand, one hundred twenty-eight".