2805861113889 has 16 divisors (see below), whose sum is σ = 3938266425600. Its totient is φ = 1772025726096.

The previous prime is 2805861113863. The next prime is 2805861113893. The reversal of 2805861113889 is 9883111685082.

It is not a de Polignac number, because 2805861113889 - 2¹¹ = 2805861111841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2805861113789) 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, 291579 + ... + 2386784.

It is an arithmetic number, because the mean of its divisors is an integer number (246141651600).

Almost surely, 2^{2805861113889} is an apocalyptic number.

It is an amenable number.

2805861113889 is a deficient number, since it is larger than the sum of its proper divisors (1132405311711).

2805861113889 is a wasteful number, since it uses less digits than its factorization.

2805861113889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696764.

The product of its (nonzero) digits is 6635520, while the sum is 60.

The spelling of 2805861113889 in words is "two trillion, eight hundred five billion, eight hundred sixty-one million, one hundred thirteen thousand, eight hundred eighty-nine".