188009461117 has 2 divisors, whose sum is σ = 188009461118. Its totient is φ = 188009461116.

The previous prime is 188009461091. The next prime is 188009461127. The reversal of 188009461117 is 711164900881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129566882116 + 58442579001 = 359954^2 + 241749^2 .

It is a cyclic number.

It is not a de Polignac number, because 188009461117 - 2¹¹ = 188009459069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188009461127) 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, 94004730558 + 94004730559.

It is an arithmetic number, because the mean of its divisors is an integer number (94004730559).

Almost surely, 2^188009461117 is an apocalyptic number.

It is an amenable number.

188009461117 is a deficient number, since it is larger than the sum of its proper divisors (1).

188009461117 is an equidigital number, since it uses as much as digits as its factorization.

188009461117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 188009461117 in words is "one hundred eighty-eight billion, nine million, four hundred sixty-one thousand, one hundred seventeen".