82018779442057 has 2 divisors, whose sum is σ = 82018779442058. Its totient is φ = 82018779442056.

The previous prime is 82018779442043. The next prime is 82018779442091. The reversal of 82018779442057 is 75024497781028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69918010166601 + 12100769275456 = 8361699^2 + 3478616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82018779442057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82018779442057.

It is not a weakly prime, because it can be changed into another prime (82018779442357) 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, 41009389721028 + 41009389721029.

It is an arithmetic number, because the mean of its divisors is an integer number (41009389721029).

Almost surely, 2^{82018779442057} is an apocalyptic number.

It is an amenable number.

82018779442057 is a deficient number, since it is larger than the sum of its proper divisors (1).

82018779442057 is an equidigital number, since it uses as much as digits as its factorization.

82018779442057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 82018779442057 in words is "eighty-two trillion, eighteen billion, seven hundred seventy-nine million, four hundred forty-two thousand, fifty-seven".