82565240305 has 4 divisors (see below), whose sum is σ = 99078288372. Its totient is φ = 66052192240.

The previous prime is 82565240299. The next prime is 82565240323. The reversal of 82565240305 is 50304256528.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46123575696 + 36441664609 = 214764^2 + 190897^2 .

It is a de Polignac number, because none of the positive numbers 2^k-82565240305 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8256524026 + ... + 8256524035.

It is an arithmetic number, because the mean of its divisors is an integer number (24769572093).

Almost surely, 2^82565240305 is an apocalyptic number.

It is an amenable number.

82565240305 is a deficient number, since it is larger than the sum of its proper divisors (16513048067).

82565240305 is a wasteful number, since it uses less digits than its factorization.

82565240305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16513048066.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 82565240305 in words is "eighty-two billion, five hundred sixty-five million, two hundred forty thousand, three hundred five".