188306016217129 has 2 divisors, whose sum is σ = 188306016217130. Its totient is φ = 188306016217128.

The previous prime is 188306016217091. The next prime is 188306016217133. The reversal of 188306016217129 is 921712610603881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188127915336729 + 178100880400 = 13715973^2 + 422020^2 .

It is a cyclic number.

It is not a de Polignac number, because 188306016217129 - 2¹¹ = 188306016215081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188306016217129.

It is not a weakly prime, because it can be changed into another prime (188306016211129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94153008108564 + 94153008108565.

It is an arithmetic number, because the mean of its divisors is an integer number (94153008108565).

Almost surely, 2^{188306016217129} is an apocalyptic number.

It is an amenable number.

188306016217129 is a deficient number, since it is larger than the sum of its proper divisors (1).

188306016217129 is an equidigital number, since it uses as much as digits as its factorization.

188306016217129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 188306016217129 in words is "one hundred eighty-eight trillion, three hundred six billion, sixteen million, two hundred seventeen thousand, one hundred twenty-nine".