82018779442091 has 2 divisors, whose sum is σ = 82018779442092. Its totient is φ = 82018779442090.

The previous prime is 82018779442057. The next prime is 82018779442139. The reversal of 82018779442091 is 19024497781028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82018779442091 - 2¹⁴ = 82018779425707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (82018779442591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41009389721045 + 41009389721046.

It is an arithmetic number, because the mean of its divisors is an integer number (41009389721046).

Almost surely, 2^{82018779442091} is an apocalyptic number.

82018779442091 is a deficient number, since it is larger than the sum of its proper divisors (1).

82018779442091 is an equidigital number, since it uses as much as digits as its factorization.

82018779442091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 82018779442091 in words is "eighty-two trillion, eighteen billion, seven hundred seventy-nine million, four hundred forty-two thousand, ninety-one".