805660883191 has 2 divisors, whose sum is σ = 805660883192. Its totient is φ = 805660883190.

The previous prime is 805660883189. The next prime is 805660883233. The reversal of 805660883191 is 191388066508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805660883191 - 2¹ = 805660883189 is a prime.

Together with 805660883189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805660883891) 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, 402830441595 + 402830441596.

It is an arithmetic number, because the mean of its divisors is an integer number (402830441596).

Almost surely, 2^805660883191 is an apocalyptic number.

805660883191 is a deficient number, since it is larger than the sum of its proper divisors (1).

805660883191 is an equidigital number, since it uses as much as digits as its factorization.

805660883191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 805660883191 in words is "eight hundred five billion, six hundred sixty million, eight hundred eighty-three thousand, one hundred ninety-one".