243328658191 has 2 divisors, whose sum is σ = 243328658192. Its totient is φ = 243328658190.

The previous prime is 243328658159. The next prime is 243328658197. The reversal of 243328658191 is 191856823342.

243328658191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243328658191 - 2⁵ = 243328658159 is a prime.

It is a super-2 number, since 2×243328658191² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243328658197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121664329095 + 121664329096.

It is an arithmetic number, because the mean of its divisors is an integer number (121664329096).

Almost surely, 2^243328658191 is an apocalyptic number.

243328658191 is a deficient number, since it is larger than the sum of its proper divisors (1).

243328658191 is an equidigital number, since it uses as much as digits as its factorization.

243328658191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 52.

The spelling of 243328658191 in words is "two hundred forty-three billion, three hundred twenty-eight million, six hundred fifty-eight thousand, one hundred ninety-one".