82520550569 has 2 divisors, whose sum is σ = 82520550570. Its totient is φ = 82520550568.

The previous prime is 82520550551. The next prime is 82520550631. The reversal of 82520550569 is 96505502528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77945380969 + 4575169600 = 279187^2 + 67640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82520550569 is a prime.

It is a super-2 number, since 2×82520550569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82520250569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41260275284 + 41260275285.

It is an arithmetic number, because the mean of its divisors is an integer number (41260275285).

Almost surely, 2^82520550569 is an apocalyptic number.

It is an amenable number.

82520550569 is a deficient number, since it is larger than the sum of its proper divisors (1).

82520550569 is an equidigital number, since it uses as much as digits as its factorization.

82520550569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The spelling of 82520550569 in words is "eighty-two billion, five hundred twenty million, five hundred fifty thousand, five hundred sixty-nine".