9820085856855 has 32 divisors (see below), whose sum is σ = 16539870950400. Its totient is φ = 4961493896832.

The previous prime is 9820085856811. The next prime is 9820085856863. The reversal of 9820085856855 is 5586585800289.

It is not a de Polignac number, because 9820085856855 - 2⁷ = 9820085856727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9820085856855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5331666 + ... + 6933024.

It is an arithmetic number, because the mean of its divisors is an integer number (516870967200).

Almost surely, 2^{9820085856855} is an apocalyptic number.

9820085856855 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9820085856855 is a deficient number, since it is larger than the sum of its proper divisors (6719785093545).

9820085856855 is a wasteful number, since it uses less digits than its factorization.

9820085856855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622903.

The product of its (nonzero) digits is 276480000, while the sum is 69.

The spelling of 9820085856855 in words is "nine trillion, eight hundred twenty billion, eighty-five million, eight hundred fifty-six thousand, eight hundred fifty-five".