2856171813 has 16 divisors (see below), whose sum is σ = 4170609216. Its totient is φ = 1724272640.

The previous prime is 2856171797. The next prime is 2856171817. The reversal of 2856171813 is 3181716582.

It is a cyclic number.

It is not a de Polignac number, because 2856171813 - 2⁴ = 2856171797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856171817) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 159906 + ... + 176867.

It is an arithmetic number, because the mean of its divisors is an integer number (260663076).

Almost surely, 2^2856171813 is an apocalyptic number.

It is an amenable number.

2856171813 is a deficient number, since it is larger than the sum of its proper divisors (1314437403).

2856171813 is a wasteful number, since it uses less digits than its factorization.

2856171813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337044.

The product of its digits is 80640, while the sum is 42.

The square root of 2856171813 is about 53443.1643243549. The cubic root of 2856171813 is about 1418.8226392767.

The spelling of 2856171813 in words is "two billion, eight hundred fifty-six million, one hundred seventy-one thousand, eight hundred thirteen".