181942566107 has 2 divisors, whose sum is σ = 181942566108. Its totient is φ = 181942566106.

The previous prime is 181942566101. The next prime is 181942566109. The reversal of 181942566107 is 701665249181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 181942566107 - 2¹⁰ = 181942565083 is a prime.

Together with 181942566109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181942566101) 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, 90971283053 + 90971283054.

It is an arithmetic number, because the mean of its divisors is an integer number (90971283054).

Almost surely, 2^181942566107 is an apocalyptic number.

181942566107 is a deficient number, since it is larger than the sum of its proper divisors (1).

181942566107 is an equidigital number, since it uses as much as digits as its factorization.

181942566107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 181942566107 in words is "one hundred eighty-one billion, nine hundred forty-two million, five hundred sixty-six thousand, one hundred seven".