189681288191 has 2 divisors, whose sum is σ = 189681288192. Its totient is φ = 189681288190.

The previous prime is 189681288143. The next prime is 189681288193. The reversal of 189681288191 is 191882186981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189681288191 - 2¹⁸ = 189681026047 is a prime.

Together with 189681288193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189681288193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94840644095 + 94840644096.

It is an arithmetic number, because the mean of its divisors is an integer number (94840644096).

Almost surely, 2^189681288191 is an apocalyptic number.

189681288191 is a deficient number, since it is larger than the sum of its proper divisors (1).

189681288191 is an equidigital number, since it uses as much as digits as its factorization.

189681288191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 62.

The spelling of 189681288191 in words is "one hundred eighty-nine billion, six hundred eighty-one million, two hundred eighty-eight thousand, one hundred ninety-one".