7644224449 has 4 divisors (see below), whose sum is σ = 7649387460. Its totient is φ = 7639061440.

The previous prime is 7644224417. The next prime is 7644224461. The reversal of 7644224449 is 9444224467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9444224467 = 18427 ⋅512521.

It can be written as a sum of positive squares in 2 ways, for example, as 2044396225 + 5599828224 = 45215^2 + 74832^2 .

It is a cyclic number.

It is not a de Polignac number, because 7644224449 - 2⁵ = 7644224417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7644224399 and 7644224408.

It is not an unprimeable number, because it can be changed into a prime (7644224479) 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 3 ways as a sum of consecutive naturals, for example, 2579284 + ... + 2582245.

It is an arithmetic number, because the mean of its divisors is an integer number (1912346865).

Almost surely, 2^7644224449 is an apocalyptic number.

It is an amenable number.

7644224449 is a deficient number, since it is larger than the sum of its proper divisors (5163011).

7644224449 is a wasteful number, since it uses less digits than its factorization.

7644224449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163010.

The product of its digits is 1548288, while the sum is 46.

The square root of 7644224449 is about 87431.2555611550. The cubic root of 7644224449 is about 1969.9013451760.

The spelling of 7644224449 in words is "seven billion, six hundred forty-four million, two hundred twenty-four thousand, four hundred forty-nine".