2820611065 has 4 divisors (see below), whose sum is σ = 3384733284. Its totient is φ = 2256488848.

The previous prime is 2820611041. The next prime is 2820611069. The reversal of 2820611065 is 5601160282.

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 824666089 + 1995944976 = 28717^2 + 44676^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820611065 - 2⁵ = 2820611033 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820611069) 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, 282061102 + ... + 282061111.

It is an arithmetic number, because the mean of its divisors is an integer number (846183321).

Almost surely, 2^2820611065 is an apocalyptic number.

It is an amenable number.

2820611065 is a deficient number, since it is larger than the sum of its proper divisors (564122219).

2820611065 is an equidigital number, since it uses as much as digits as its factorization.

2820611065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564122218.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 2820611065 is about 53109.4253875901. The cubic root of 2820611065 is about 1412.9096839667.

The spelling of 2820611065 in words is "two billion, eight hundred twenty million, six hundred eleven thousand, sixty-five".