5243544665 has 32 divisors (see below), whose sum is σ = 6981292800. Its totient is φ = 3764517120.

The previous prime is 5243544661. The next prime is 5243544697. The reversal of 5243544665 is 5664453425.

It is a happy number.

It is not a de Polignac number, because 5243544665 - 2² = 5243544661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5243544661) 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 31 ways as a sum of consecutive naturals, for example, 128060 + ... + 163970.

It is an arithmetic number, because the mean of its divisors is an integer number (218165400).

Almost surely, 2^5243544665 is an apocalyptic number.

It is an amenable number.

5243544665 is a deficient number, since it is larger than the sum of its proper divisors (1737748135).

5243544665 is a wasteful number, since it uses less digits than its factorization.

5243544665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36017.

The product of its digits is 1728000, while the sum is 44.

The square root of 5243544665 is about 72412.3239856311. The cubic root of 5243544665 is about 1737.3006837251.

The spelling of 5243544665 in words is "five billion, two hundred forty-three million, five hundred forty-four thousand, six hundred sixty-five".