817328858085 has 48 divisors (see below), whose sum is σ = 1463284892160. Its totient is φ = 421592895360.

The previous prime is 817328857999. The next prime is 817328858089. The reversal of 817328858085 is 580858823718.

817328858085 is a `hidden beast` number, since 8 + 17 + 32 + 8 + 8 + 580 + 8 + 5 = 666.

It is not a de Polignac number, because 817328858085 - 2⁹ = 817328857573 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817328858089) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2149731 + ... + 2501199.

It is an arithmetic number, because the mean of its divisors is an integer number (30485101920).

Almost surely, 2^817328858085 is an apocalyptic number.

It is an amenable number.

817328858085 is a deficient number, since it is larger than the sum of its proper divisors (645956034075).

817328858085 is a wasteful number, since it uses less digits than its factorization.

817328858085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353178 (or 353175 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 63.

The spelling of 817328858085 in words is "eight hundred seventeen billion, three hundred twenty-eight million, eight hundred fifty-eight thousand, eighty-five".