7445665448 has 48 divisors (see below), whose sum is σ = 15132800700. Its totient is φ = 3432898560.

The previous prime is 7445665433. The next prime is 7445665453. The reversal of 7445665448 is 8445665447.

It can be written as a sum of positive squares in 6 ways, for example, as 4435826404 + 3009839044 = 66602^2 + 54862^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7445665448.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1659368 + ... + 1663848.

Almost surely, 2^7445665448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7445665448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7566400350).

7445665448 is an abundant number, since it is smaller than the sum of its proper divisors (7687135252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7445665448 is a wasteful number, since it uses less digits than its factorization.

7445665448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742 (or 5725 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 53.

The square root of 7445665448 is about 86288.2694692622. The cubic root of 7445665448 is about 1952.6954132535.

Subtracting 7445665448 from its reverse (8445665447), we obtain a palindrome (999999999).

The spelling of 7445665448 in words is "seven billion, four hundred forty-five million, six hundred sixty-five thousand, four hundred forty-eight".