745648441 has 4 divisors (see below), whose sum is σ = 789510132. Its totient is φ = 701786752.

The previous prime is 745648411. The next prime is 745648447. The reversal of 745648441 is 144846547.

It is a happy number.

745648441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 626751225 + 118897216 = 25035^2 + 10904^2 .

It is a cyclic number.

It is not a de Polignac number, because 745648441 - 2¹⁷ = 745517369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745648447) 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, 21930820 + ... + 21930853.

It is an arithmetic number, because the mean of its divisors is an integer number (197377533).

Almost surely, 2^745648441 is an apocalyptic number.

It is an amenable number.

745648441 is a deficient number, since it is larger than the sum of its proper divisors (43861691).

745648441 is a wasteful number, since it uses less digits than its factorization.

745648441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43861690.

The product of its digits is 430080, while the sum is 43.

The square root of 745648441 is about 27306.5640643417. The cubic root of 745648441 is about 906.7997075502.

The spelling of 745648441 in words is "seven hundred forty-five million, six hundred forty-eight thousand, four hundred forty-one".