4065085813 has 4 divisors (see below), whose sum is σ = 4068726220. Its totient is φ = 4061445408.

The previous prime is 4065085793. The next prime is 4065085819. The reversal of 4065085813 is 3185805604.

4065085813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178436164 + 3886649649 = 13358^2 + 62343^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065085813 - 2²⁵ = 4031531381 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 (4065085819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1818528 + ... + 1820761.

It is an arithmetic number, because the mean of its divisors is an integer number (1017181555).

Almost surely, 2^4065085813 is an apocalyptic number.

It is an amenable number.

4065085813 is a deficient number, since it is larger than the sum of its proper divisors (3640407).

4065085813 is a wasteful number, since it uses less digits than its factorization.

4065085813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640406.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 4065085813 is about 63758.0254791505. The cubic root of 4065085813 is about 1595.9645457343.

The spelling of 4065085813 in words is "four billion, sixty-five million, eighty-five thousand, eight hundred thirteen".