7448744509 has 4 divisors (see below), whose sum is σ = 7514662716. Its totient is φ = 7382826304.

The previous prime is 7448744507. The next prime is 7448744519. The reversal of 7448744509 is 9054478447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1713711609 + 5735032900 = 41397^2 + 75730^2 .

It is a cyclic number.

It is not a de Polignac number, because 7448744509 - 2¹ = 7448744507 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 (7448744507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32958934 + ... + 32959159.

It is an arithmetic number, because the mean of its divisors is an integer number (1878665679).

Almost surely, 2^7448744509 is an apocalyptic number.

It is an amenable number.

7448744509 is a deficient number, since it is larger than the sum of its proper divisors (65918207).

7448744509 is a wasteful number, since it uses less digits than its factorization.

7448744509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65918206.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The square root of 7448744509 is about 86306.1093376361. The cubic root of 7448744509 is about 1952.9645470079.

The spelling of 7448744509 in words is "seven billion, four hundred forty-eight million, seven hundred forty-four thousand, five hundred nine".