22144861771788 has 192 divisors, whose sum is σ = 60012262195200. Its totient is φ = 6224916372480.

The previous prime is 22144861771787. The next prime is 22144861771817. The reversal of 22144861771788 is 88717716844122.

It is not an unprimeable number, because it can be changed into a prime (22144861771787) 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, 4233387133 + ... + 4233392363.

It is an arithmetic number, because the mean of its divisors is an integer number (312563865600).

Almost surely, 2^{22144861771788} is an apocalyptic number.

22144861771788 is a gapful number since it is divisible by the number (28) 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 22144861771788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30006131097600).

22144861771788 is an abundant number, since it is smaller than the sum of its proper divisors (37867400423412).

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

22144861771788 is a wasteful number, since it uses less digits than its factorization.

22144861771788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7460 (or 7458 counting only the distinct ones).

The product of its digits is 67436544, while the sum is 66.

The spelling of 22144861771788 in words is "twenty-two trillion, one hundred forty-four billion, eight hundred sixty-one million, seven hundred seventy-one thousand, seven hundred eighty-eight".