82568371309 has 8 divisors (see below), whose sum is σ = 82651823928. Its totient is φ = 82484962560.

The previous prime is 82568371253. The next prime is 82568371321. The reversal of 82568371309 is 90317386528.

It can be written as a sum of positive squares in 4 ways, for example, as 26362393225 + 56205978084 = 162365^2 + 237078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82568371309 - 2⁷ = 82568371181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82568351309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4731969 + ... + 4749385.

It is an arithmetic number, because the mean of its divisors is an integer number (10331477991).

Almost surely, 2^82568371309 is an apocalyptic number.

It is an amenable number.

82568371309 is a deficient number, since it is larger than the sum of its proper divisors (83452619).

82568371309 is a wasteful number, since it uses less digits than its factorization.

82568371309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21935.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 82568371309 in words is "eighty-two billion, five hundred sixty-eight million, three hundred seventy-one thousand, three hundred nine".