2081853811917 has 48 divisors (see below), whose sum is σ = 3387982178880. Its totient is φ = 1220770137600.

The previous prime is 2081853811903. The next prime is 2081853811927. The reversal of 2081853811917 is 7191183581802.

2081853811917 is a `hidden beast` number, since 2 + 0 + 8 + 1 + 8 + 538 + 11 + 91 + 7 = 666.

It is not a de Polignac number, because 2081853811917 - 2¹⁶ = 2081853746381 is a prime.

It is a super-3 number, since 3×2081853811917³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081853811927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 931884 + ... + 2243237.

It is an arithmetic number, because the mean of its divisors is an integer number (70582962060).

Almost surely, 2^{2081853811917} is an apocalyptic number.

It is an amenable number.

2081853811917 is a deficient number, since it is larger than the sum of its proper divisors (1306128366963).

2081853811917 is a wasteful number, since it uses less digits than its factorization.

2081853811917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175354 (or 3175351 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 54.

The spelling of 2081853811917 in words is "two trillion, eighty-one billion, eight hundred fifty-three million, eight hundred eleven thousand, nine hundred seventeen".