43724064609 has 27 divisors (see below), whose sum is σ = 64572880593. Its totient is φ = 28509939432.

The previous prime is 43724064589. The next prime is 43724064611. The reversal of 43724064609 is 90646042734.

It is a happy number.

The square root of 43724064609 is 209103.

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

43724064609 is a `hidden beast` number, since 4 + 37 + 2 + 4 + 0 + 6 + 4 + 609 = 666.

It is not a de Polignac number, because 43724064609 - 2⁵ = 43724064577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43724064679) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29482782 + ... + 29484264.

Almost surely, 2^43724064609 is an apocalyptic number.

43724064609 is the 209103-rd square number.

43724064609 is the 104552-nd centered octagonal number.

It is an amenable number.

43724064609 is a deficient number, since it is larger than the sum of its proper divisors (20848815984).

43724064609 is an frugal number, since it uses more digits than its factorization.

43724064609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 43724064609 in words is "forty-three billion, seven hundred twenty-four million, sixty-four thousand, six hundred nine".