2806640206868 has 12 divisors (see below), whose sum is σ = 4918451549760. Its totient is φ = 1401368335512.

The previous prime is 2806640206861. The next prime is 2806640206871. The reversal of 2806640206868 is 8686020466082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806640206861) 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 3 ways as a sum of consecutive naturals, for example, 487938746 + ... + 487944497.

It is an arithmetic number, because the mean of its divisors is an integer number (409870962480).

Almost surely, 2^{2806640206868} is an apocalyptic number.

It is an amenable number.

2806640206868 is a deficient number, since it is larger than the sum of its proper divisors (2111811342892).

2806640206868 is a wasteful number, since it uses less digits than its factorization.

2806640206868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975883966 (or 975883964 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 2806640206868 in words is "two trillion, eight hundred six billion, six hundred forty million, two hundred six thousand, eight hundred sixty-eight".