6443165461 has 8 divisors (see below), whose sum is σ = 6857526744. Its totient is φ = 6032732160.

The previous prime is 6443165453. The next prime is 6443165471. The reversal of 6443165461 is 1645613446.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2523153361 + 3920012100 = 50231^2 + 62610^2 .

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 6443165461 - 2³ = 6443165453 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 (6443165401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978610 + ... + 985171.

It is an arithmetic number, because the mean of its divisors is an integer number (857190843).

Almost surely, 2^6443165461 is an apocalyptic number.

It is an amenable number.

6443165461 is a deficient number, since it is larger than the sum of its proper divisors (414361283).

6443165461 is a wasteful number, since it uses less digits than its factorization.

6443165461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963991.

The product of its digits is 207360, while the sum is 40.

The square root of 6443165461 is about 80269.3307621286. The cubic root of 6443165461 is about 1860.8002742936.

The spelling of 6443165461 in words is "six billion, four hundred forty-three million, one hundred sixty-five thousand, four hundred sixty-one".