82671537237481 has 2 divisors, whose sum is σ = 82671537237482. Its totient is φ = 82671537237480.

The previous prime is 82671537237479. The next prime is 82671537237491. The reversal of 82671537237481 is 18473273517628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53963201781225 + 28708335456256 = 7345965^2 + 5358016^2 .

It is a cyclic number.

It is not a de Polignac number, because 82671537237481 - 2¹ = 82671537237479 is a prime.

It is a super-2 number, since 2×82671537237481² (a number of 29 digits) contains 22 as substring.

Together with 82671537237479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82671537237491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41335768618740 + 41335768618741.

It is an arithmetic number, because the mean of its divisors is an integer number (41335768618741).

Almost surely, 2^{82671537237481} is an apocalyptic number.

It is an amenable number.

82671537237481 is a deficient number, since it is larger than the sum of its proper divisors (1).

82671537237481 is an equidigital number, since it uses as much as digits as its factorization.

82671537237481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94832640, while the sum is 64.

The spelling of 82671537237481 in words is "eighty-two trillion, six hundred seventy-one billion, five hundred thirty-seven million, two hundred thirty-seven thousand, four hundred eighty-one".