188968805705 has 4 divisors (see below), whose sum is σ = 226762566852. Its totient is φ = 151175044560.

The previous prime is 188968805687. The next prime is 188968805741. The reversal of 188968805705 is 507508869881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64116823369 + 124851982336 = 253213^2 + 353344^2 .

It is not a de Polignac number, because 188968805705 - 2¹⁰ = 188968804681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 18896880566 + ... + 18896880575.

It is an arithmetic number, because the mean of its divisors is an integer number (56690641713).

Almost surely, 2^188968805705 is an apocalyptic number.

It is an amenable number.

188968805705 is a deficient number, since it is larger than the sum of its proper divisors (37793761147).

188968805705 is an equidigital number, since it uses as much as digits as its factorization.

188968805705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37793761146.

The product of its (nonzero) digits is 38707200, while the sum is 65.

The spelling of 188968805705 in words is "one hundred eighty-eight billion, nine hundred sixty-eight million, eight hundred five thousand, seven hundred five".