7443648653 has 18 divisors (see below), whose sum is σ = 8827528554. Its totient is φ = 6256190304.

The previous prime is 7443648649. The next prime is 7443648673. The reversal of 7443648653 is 3568463447.

It can be written as a sum of positive squares in 3 ways, for example, as 1059958249 + 6383690404 = 32557^2 + 79898^2 .

It is not a de Polignac number, because 7443648653 - 2² = 7443648649 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 (7443648613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4395875 + ... + 4397567.

It is an arithmetic number, because the mean of its divisors is an integer number (490418253).

Almost surely, 2^7443648653 is an apocalyptic number.

It is an amenable number.

7443648653 is a deficient number, since it is larger than the sum of its proper divisors (1383879901).

7443648653 is an frugal number, since it uses more digits than its factorization.

7443648653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453 (or 1753 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 50.

The square root of 7443648653 is about 86276.5822978634. The cubic root of 7443648653 is about 1952.5190895475.

The spelling of 7443648653 in words is "seven billion, four hundred forty-three million, six hundred forty-eight thousand, six hundred fifty-three".