83649784489 has 4 divisors (see below), whose sum is σ = 83666997700. Its totient is φ = 83632571280.

The previous prime is 83649784481. The next prime is 83649784573. The reversal of 83649784489 is 98448794638.

It is a happy number.

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 75779078400 + 7870706089 = 275280^2 + 88717^2 .

It is a cyclic number.

It is not a de Polignac number, because 83649784489 - 2³ = 83649784481 is a prime.

It is a super-2 number, since 2×83649784489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83649784481) 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, 8599314 + ... + 8609035.

It is an arithmetic number, because the mean of its divisors is an integer number (20916749425).

Almost surely, 2^83649784489 is an apocalyptic number.

It is an amenable number.

83649784489 is a deficient number, since it is larger than the sum of its proper divisors (17213211).

83649784489 is a wasteful number, since it uses less digits than its factorization.

83649784489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17213210.

The product of its digits is 334430208, while the sum is 70.

The spelling of 83649784489 in words is "eighty-three billion, six hundred forty-nine million, seven hundred eighty-four thousand, four hundred eighty-nine".