828075804085 has 4 divisors (see below), whose sum is σ = 993690964908. Its totient is φ = 662460643264.

The previous prime is 828075804079. The next prime is 828075804097. The reversal of 828075804085 is 580408570828.

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 610764132196 + 217311671889 = 781514^2 + 466167^2 .

It is a cyclic number.

It is not a de Polignac number, because 828075804085 - 2¹⁵ = 828075771317 is a prime.

It is a super-2 number, since 2×828075804085² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 82807580404 + ... + 82807580413.

It is an arithmetic number, because the mean of its divisors is an integer number (248422741227).

Almost surely, 2^828075804085 is an apocalyptic number.

It is an amenable number.

828075804085 is a deficient number, since it is larger than the sum of its proper divisors (165615160823).

828075804085 is a wasteful number, since it uses less digits than its factorization.

828075804085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165615160822.

The product of its (nonzero) digits is 5734400, while the sum is 55.

The spelling of 828075804085 in words is "eight hundred twenty-eight billion, seventy-five million, eight hundred four thousand, eighty-five".