4438081913 has 4 divisors (see below), whose sum is σ = 4438226688. Its totient is φ = 4437937140.

The previous prime is 4438081891. The next prime is 4438081919. The reversal of 4438081913 is 3191808344.

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 4438081913 - 2¹⁸ = 4437819769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4438081919) 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, 6281 + ... + 94422.

It is an arithmetic number, because the mean of its divisors is an integer number (1109556672).

Almost surely, 2^4438081913 is an apocalyptic number.

It is an amenable number.

4438081913 is a deficient number, since it is larger than the sum of its proper divisors (144775).

4438081913 is a wasteful number, since it uses less digits than its factorization.

4438081913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144774.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 4438081913 is about 66618.9305903360. The cubic root of 4438081913 is about 1643.3564406077.

The spelling of 4438081913 in words is "four billion, four hundred thirty-eight million, eighty-one thousand, nine hundred thirteen".