8257871232209 has 8 divisors (see below), whose sum is σ = 8627205865320. Its totient is φ = 7894175296000.

The previous prime is 8257871232187. The next prime is 8257871232251. The reversal of 8257871232209 is 9022321787528.

It can be written as a sum of positive squares in 4 ways, for example, as 825786577984 + 7432084654225 = 908728^2 + 2726185^2 .

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 8257871232209 - 2¹⁶ = 8257871166673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8257871232409) 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, 1409671232 + ... + 1409677089.

It is an arithmetic number, because the mean of its divisors is an integer number (1078400733165).

Almost surely, 2^{8257871232209} is an apocalyptic number.

It is an amenable number.

8257871232209 is a deficient number, since it is larger than the sum of its proper divisors (369334633111).

8257871232209 is a wasteful number, since it uses less digits than its factorization.

8257871232209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819348451.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 8257871232209 in words is "eight trillion, two hundred fifty-seven billion, eight hundred seventy-one million, two hundred thirty-two thousand, two hundred nine".