188504135917 has 2 divisors, whose sum is σ = 188504135918. Its totient is φ = 188504135916.

The previous prime is 188504135903. The next prime is 188504135929. The reversal of 188504135917 is 719531405881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156036060196 + 32468075721 = 395014^2 + 180189^2 .

It is a cyclic number.

It is not a de Polignac number, because 188504135917 - 2¹⁵ = 188504103149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188504136917) 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, 94252067958 + 94252067959.

It is an arithmetic number, because the mean of its divisors is an integer number (94252067959).

Almost surely, 2^188504135917 is an apocalyptic number.

It is an amenable number.

188504135917 is a deficient number, since it is larger than the sum of its proper divisors (1).

188504135917 is an equidigital number, since it uses as much as digits as its factorization.

188504135917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 188504135917 in words is "one hundred eighty-eight billion, five hundred four million, one hundred thirty-five thousand, nine hundred seventeen".