188988327571681 has 24 divisors (see below), whose sum is σ = 219013527826080. Its totient is φ = 161698686643200.

The previous prime is 188988327571643. The next prime is 188988327571723. The reversal of 188988327571681 is 186175723889881.

It is not a de Polignac number, because 188988327571681 - 2¹⁹ = 188988327047393 is a prime.

It is a super-2 number, since 2×188988327571681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 188988327571595 and 188988327571604.

It is not an unprimeable number, because it can be changed into a prime (188988327571481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216400626 + ... + 217272196.

It is an arithmetic number, because the mean of its divisors is an integer number (9125563659420).

Almost surely, 2^{188988327571681} is an apocalyptic number.

188988327571681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

188988327571681 is a deficient number, since it is larger than the sum of its proper divisors (30025200254399).

188988327571681 is a wasteful number, since it uses less digits than its factorization.

188988327571681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939825 (or 939808 counting only the distinct ones).

The product of its digits is 2601123840, while the sum is 82.

The spelling of 188988327571681 in words is "one hundred eighty-eight trillion, nine hundred eighty-eight billion, three hundred twenty-seven million, five hundred seventy-one thousand, six hundred eighty-one".