43834540689 has 45 divisors (see below), whose sum is σ = 67163607819. Its totient is φ = 28490661360.

The previous prime is 43834540667. The next prime is 43834540693. The reversal of 43834540689 is 98604543834.

The square root of 43834540689 is 209367.

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

43834540689 is a `hidden beast` number, since 4 + 3 + 8 + 34 + 540 + 68 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17415289089 + 26419251600 = 131967^2 + 162540^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43834540689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43834540619) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 81024759 + ... + 81025299.

Almost surely, 2^43834540689 is an apocalyptic number.

43834540689 is the 209367-th square number.

43834540689 is the 104684-th centered octagonal number.

It is an amenable number.

43834540689 is a deficient number, since it is larger than the sum of its proper divisors (23329067130).

43834540689 is an frugal number, since it uses more digits than its factorization.

43834540689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 43834540689 in words is "forty-three billion, eight hundred thirty-four million, five hundred forty thousand, six hundred eighty-nine".