6436211065 has 4 divisors (see below), whose sum is σ = 7723453284. Its totient is φ = 5148968848.

The previous prime is 6436211053. The next prime is 6436211071. The reversal of 6436211065 is 5601126346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5601126346 = 2 ⋅2800563173.

It can be written as a sum of positive squares in 2 ways, for example, as 1253938921 + 5182272144 = 35411^2 + 71988^2 .

It is a cyclic number.

It is not a de Polignac number, because 6436211065 - 2⁹ = 6436210553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6436211065.

It is an unprimeable number.

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, 643621102 + ... + 643621111.

It is an arithmetic number, because the mean of its divisors is an integer number (1930863321).

Almost surely, 2^6436211065 is an apocalyptic number.

It is an amenable number.

6436211065 is a deficient number, since it is larger than the sum of its proper divisors (1287242219).

6436211065 is a wasteful number, since it uses less digits than its factorization.

6436211065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287242218.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6436211065 is about 80225.9999314437. Note that the first 4 decimals coincide. The cubic root of 6436211065 is about 1860.1305516913.

The spelling of 6436211065 in words is "six billion, four hundred thirty-six million, two hundred eleven thousand, sixty-five".