188718860685653 has 2 divisors, whose sum is σ = 188718860685654. Its totient is φ = 188718860685652.

The previous prime is 188718860685601. The next prime is 188718860685709. The reversal of 188718860685653 is 356586068817881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188196199645444 + 522661040209 = 13718462^2 + 722953^2 .

It is a cyclic number.

It is not a de Polignac number, because 188718860685653 - 2²⁸ = 188718592250197 is a prime.

It is a super-2 number, since 2×188718860685653² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188718860685053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94359430342826 + 94359430342827.

It is an arithmetic number, because the mean of its divisors is an integer number (94359430342827).

Almost surely, 2^{188718860685653} is an apocalyptic number.

It is an amenable number.

188718860685653 is a deficient number, since it is larger than the sum of its proper divisors (1).

188718860685653 is an equidigital number, since it uses as much as digits as its factorization.

188718860685653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3715891200, while the sum is 80.

The spelling of 188718860685653 in words is "one hundred eighty-eight trillion, seven hundred eighteen billion, eight hundred sixty million, six hundred eighty-five thousand, six hundred fifty-three".