827505085281 has 8 divisors (see below), whose sum is σ = 1260960129984. Its totient is φ = 472860048720.

The previous prime is 827505085273. The next prime is 827505085343. The reversal of 827505085281 is 182580505728.

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

It is not a de Polignac number, because 827505085281 - 2³ = 827505085273 is a prime.

It is a super-2 number, since 2×827505085281² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (827505083281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19702502010 + ... + 19702502051.

It is an arithmetic number, because the mean of its divisors is an integer number (157620016248).

Almost surely, 2^827505085281 is an apocalyptic number.

It is an amenable number.

827505085281 is a deficient number, since it is larger than the sum of its proper divisors (433455044703).

827505085281 is a wasteful number, since it uses less digits than its factorization.

827505085281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39405004071.

The product of its (nonzero) digits is 1792000, while the sum is 51.

The spelling of 827505085281 in words is "eight hundred twenty-seven billion, five hundred five million, eighty-five thousand, two hundred eighty-one".