64043543 has 4 divisors (see below), whose sum is σ = 64062600. Its totient is φ = 64024488.

The previous prime is 64043537. The next prime is 64043561. The reversal of 64043543 is 34534046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64043543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64043843) 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, 2993 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (16015650).

Almost surely, 2^64043543 is an apocalyptic number.

64043543 is a deficient number, since it is larger than the sum of its proper divisors (19057).

64043543 is a wasteful number, since it uses less digits than its factorization.

64043543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19056.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 64043543 is about 8002.7209747685. The cubic root of 64043543 is about 400.0906940183.

Adding to 64043543 its reverse (34534046), we get a palindrome (98577589).

The spelling of 64043543 in words is "sixty-four million, forty-three thousand, five hundred forty-three".