188659541381 has 2 divisors, whose sum is σ = 188659541382. Its totient is φ = 188659541380.

The previous prime is 188659541359. The next prime is 188659541423. The reversal of 188659541381 is 183145956881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114589020100 + 74070521281 = 338510^2 + 272159^2 .

It is an emirp because it is prime and its reverse (183145956881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188659541381 is a prime.

It is a super-2 number, since 2×188659541381² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188659541381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188659541321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94329770690 + 94329770691.

It is an arithmetic number, because the mean of its divisors is an integer number (94329770691).

Almost surely, 2^188659541381 is an apocalyptic number.

It is an amenable number.

188659541381 is a deficient number, since it is larger than the sum of its proper divisors (1).

188659541381 is an equidigital number, since it uses as much as digits as its factorization.

188659541381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8294400, while the sum is 59.

The spelling of 188659541381 in words is "one hundred eighty-eight billion, six hundred fifty-nine million, five hundred forty-one thousand, three hundred eighty-one".