82707776577161 has 2 divisors, whose sum is σ = 82707776577162. Its totient is φ = 82707776577160.

The previous prime is 82707776577157. The next prime is 82707776577163. The reversal of 82707776577161 is 16177567770728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65188361792761 + 17519414784400 = 8073931^2 + 4185620^2 .

It is a cyclic number.

It is not a de Polignac number, because 82707776577161 - 2² = 82707776577157 is a prime.

Together with 82707776577163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82707776577163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41353888288580 + 41353888288581.

It is an arithmetic number, because the mean of its divisors is an integer number (41353888288581).

Almost surely, 2^{82707776577161} is an apocalyptic number.

It is an amenable number.

82707776577161 is a deficient number, since it is larger than the sum of its proper divisors (1).

82707776577161 is an equidigital number, since it uses as much as digits as its factorization.

82707776577161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338829120, while the sum is 71.

The spelling of 82707776577161 in words is "eighty-two trillion, seven hundred seven billion, seven hundred seventy-six million, five hundred seventy-seven thousand, one hundred sixty-one".