82501608569 has 2 divisors, whose sum is σ = 82501608570. Its totient is φ = 82501608568.

The previous prime is 82501608521. The next prime is 82501608571. The reversal of 82501608569 is 96580610528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61006530025 + 21495078544 = 246995^2 + 146612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82501608569 is a prime.

It is a super-2 number, since 2×82501608569² (a number of 23 digits) contains 22 as substring.

Together with 82501608571, 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 (82501608589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41250804284 + 41250804285.

It is an arithmetic number, because the mean of its divisors is an integer number (41250804285).

Almost surely, 2^82501608569 is an apocalyptic number.

It is an amenable number.

82501608569 is a deficient number, since it is larger than the sum of its proper divisors (1).

82501608569 is an equidigital number, since it uses as much as digits as its factorization.

82501608569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 82501608569 in words is "eighty-two billion, five hundred one million, six hundred eight thousand, five hundred sixty-nine".