981788000191 has 2 divisors, whose sum is σ = 981788000192. Its totient is φ = 981788000190.

The previous prime is 981788000173. The next prime is 981788000257. The reversal of 981788000191 is 191000887189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981788000191 - 2¹¹ = 981787998143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981788300191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490894000095 + 490894000096.

It is an arithmetic number, because the mean of its divisors is an integer number (490894000096).

Almost surely, 2^981788000191 is an apocalyptic number.

981788000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

981788000191 is an equidigital number, since it uses as much as digits as its factorization.

981788000191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 52.

The spelling of 981788000191 in words is "nine hundred eighty-one billion, seven hundred eighty-eight million, one hundred ninety-one", and thus it is an aban number.