2170847851085 has 32 divisors (see below), whose sum is σ = 2725029734400. Its totient is φ = 1658318688000.

The previous prime is 2170847851063. The next prime is 2170847851129. The reversal of 2170847851085 is 5801587480712.

It is a happy number.

It is not a de Polignac number, because 2170847851085 - 2¹² = 2170847846989 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2170847851085.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3176099 + ... + 3798591.

It is an arithmetic number, because the mean of its divisors is an integer number (85157179200).

Almost surely, 2^{2170847851085} is an apocalyptic number.

It is an amenable number.

2170847851085 is a deficient number, since it is larger than the sum of its proper divisors (554181883315).

2170847851085 is a wasteful number, since it uses less digits than its factorization.

2170847851085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622829.

The product of its (nonzero) digits is 5017600, while the sum is 56.

The spelling of 2170847851085 in words is "two trillion, one hundred seventy billion, eight hundred forty-seven million, eight hundred fifty-one thousand, eighty-five".