8454144639 has 16 divisors (see below), whose sum is σ = 12089347200. Its totient is φ = 5238713376.

The previous prime is 8454144637. The next prime is 8454144649. The reversal of 8454144639 is 9364414548.

It is a happy number.

It is not a de Polignac number, because 8454144639 - 2¹ = 8454144637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8454144637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1396209 + ... + 1402250.

It is an arithmetic number, because the mean of its divisors is an integer number (755584200).

Almost surely, 2^8454144639 is an apocalyptic number.

8454144639 is a deficient number, since it is larger than the sum of its proper divisors (3635202561).

8454144639 is a wasteful number, since it uses less digits than its factorization.

8454144639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798534.

The product of its digits is 1658880, while the sum is 48.

The square root of 8454144639 is about 91946.4226547178. The cubic root of 8454144639 is about 2037.1510146589.

The spelling of 8454144639 in words is "eight billion, four hundred fifty-four million, one hundred forty-four thousand, six hundred thirty-nine".