38644875889 has 3 divisors (see below), whose sum is σ = 38645072473. Its totient is φ = 38644679306.

The previous prime is 38644875803. The next prime is 38644875937. The reversal of 38644875889 is 98857844683.

The square root of 38644875889 is 196583.

It is a perfect power (a square), and thus also a powerful number.

38644875889 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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 38644875889 - 2²¹ = 38642778737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38644875389) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 98292 + ... + 294874.

Almost surely, 2^38644875889 is an apocalyptic number.

38644875889 is the 196583-rd square number.

38644875889 is the 98292-nd centered octagonal number.

It is an amenable number.

38644875889 is a deficient number, since it is larger than the sum of its proper divisors (196584).

38644875889 is an frugal number, since it uses more digits than its factorization.

38644875889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393166 (or 196583 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 70.

The spelling of 38644875889 in words is "thirty-eight billion, six hundred forty-four million, eight hundred seventy-five thousand, eight hundred eighty-nine".