82139510017 has 2 divisors, whose sum is σ = 82139510018. Its totient is φ = 82139510016.

The previous prime is 82139509999. The next prime is 82139510023. The reversal of 82139510017 is 71001593128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76568977521 + 5570532496 = 276711^2 + 74636^2 .

It is a cyclic number.

It is not a de Polignac number, because 82139510017 - 2¹¹ = 82139507969 is a prime.

It is not a weakly prime, because it can be changed into another prime (82139510417) 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, 41069755008 + 41069755009.

It is an arithmetic number, because the mean of its divisors is an integer number (41069755009).

Almost surely, 2^82139510017 is an apocalyptic number.

It is an amenable number.

82139510017 is a deficient number, since it is larger than the sum of its proper divisors (1).

82139510017 is an equidigital number, since it uses as much as digits as its factorization.

82139510017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 82139510017 in words is "eighty-two billion, one hundred thirty-nine million, five hundred ten thousand, seventeen".