4441643513 has 4 divisors (see below), whose sum is σ = 4584922368. Its totient is φ = 4298364660.

The previous prime is 4441643461. The next prime is 4441643537. The reversal of 4441643513 is 3153461444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4441643513 - 2⁶ = 4441643449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4441648513) 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, 71639381 + ... + 71639442.

It is an arithmetic number, because the mean of its divisors is an integer number (1146230592).

Almost surely, 2^4441643513 is an apocalyptic number.

It is an amenable number.

4441643513 is a deficient number, since it is larger than the sum of its proper divisors (143278855).

4441643513 is a wasteful number, since it uses less digits than its factorization.

4441643513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143278854.

The product of its digits is 69120, while the sum is 35.

The square root of 4441643513 is about 66645.6563700891. The cubic root of 4441643513 is about 1643.7959257593.

The spelling of 4441643513 in words is "four billion, four hundred forty-one million, six hundred forty-three thousand, five hundred thirteen".