191591463067 has 2 divisors, whose sum is σ = 191591463068. Its totient is φ = 191591463066.

The previous prime is 191591463059. The next prime is 191591463113. The reversal of 191591463067 is 760364195191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191591463067 - 2³ = 191591463059 is a prime.

It is not a weakly prime, because it can be changed into another prime (191591469067) 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, 95795731533 + 95795731534.

It is an arithmetic number, because the mean of its divisors is an integer number (95795731534).

Almost surely, 2^191591463067 is an apocalyptic number.

191591463067 is a deficient number, since it is larger than the sum of its proper divisors (1).

191591463067 is an equidigital number, since it uses as much as digits as its factorization.

191591463067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 191591463067 in words is "one hundred ninety-one billion, five hundred ninety-one million, four hundred sixty-three thousand, sixty-seven".