188216517871 has 2 divisors, whose sum is σ = 188216517872. Its totient is φ = 188216517870.

The previous prime is 188216517869. The next prime is 188216517913. The reversal of 188216517871 is 178715612881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 188216517871 - 2¹ = 188216517869 is a prime.

Together with 188216517869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188216517371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94108258935 + 94108258936.

It is an arithmetic number, because the mean of its divisors is an integer number (94108258936).

Almost surely, 2^188216517871 is an apocalyptic number.

188216517871 is a deficient number, since it is larger than the sum of its proper divisors (1).

188216517871 is an equidigital number, since it uses as much as digits as its factorization.

188216517871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1505280, while the sum is 55.

The spelling of 188216517871 in words is "one hundred eighty-eight billion, two hundred sixteen million, five hundred seventeen thousand, eight hundred seventy-one".