82495164415981 has 2 divisors, whose sum is σ = 82495164415982. Its totient is φ = 82495164415980.

The previous prime is 82495164415931. The next prime is 82495164416017. The reversal of 82495164415981 is 18951446159428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82455934275625 + 39230140356 = 9080525^2 + 198066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82495164415981 is a prime.

It is a super-2 number, since 2×82495164415981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82495164415931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41247582207990 + 41247582207991.

It is an arithmetic number, because the mean of its divisors is an integer number (41247582207991).

Almost surely, 2^{82495164415981} is an apocalyptic number.

It is an amenable number.

82495164415981 is a deficient number, since it is larger than the sum of its proper divisors (1).

82495164415981 is an equidigital number, since it uses as much as digits as its factorization.

82495164415981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99532800, while the sum is 67.

The spelling of 82495164415981 in words is "eighty-two trillion, four hundred ninety-five billion, one hundred sixty-four million, four hundred fifteen thousand, nine hundred eighty-one".