2805381863 has 8 divisors (see below), whose sum is σ = 2960958000. Its totient is φ = 2650598208.

The previous prime is 2805381853. The next prime is 2805381869. The reversal of 2805381863 is 3681835082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2805381863 - 2¹⁰ = 2805380839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805381869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190838 + ... + 205011.

It is an arithmetic number, because the mean of its divisors is an integer number (370119750).

Almost surely, 2^2805381863 is an apocalyptic number.

2805381863 is a deficient number, since it is larger than the sum of its proper divisors (155576137).

2805381863 is a wasteful number, since it uses less digits than its factorization.

2805381863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396241.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 2805381863 is about 52965.8556336061. The cubic root of 2805381863 is about 1410.3622064624.

The spelling of 2805381863 in words is "two billion, eight hundred five million, three hundred eighty-one thousand, eight hundred sixty-three".