64568543 has 4 divisors (see below), whose sum is σ = 69535368. Its totient is φ = 59601720.

The previous prime is 64568531. The next prime is 64568557. The reversal of 64568543 is 34586546.

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

It is a cyclic number.

It is not a de Polignac number, because 64568543 - 2¹² = 64564447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64568543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64568513) 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, 2483393 + ... + 2483418.

It is an arithmetic number, because the mean of its divisors is an integer number (17383842).

Almost surely, 2^64568543 is an apocalyptic number.

64568543 is a deficient number, since it is larger than the sum of its proper divisors (4966825).

64568543 is a wasteful number, since it uses less digits than its factorization.

64568543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966824.

The product of its digits is 345600, while the sum is 41.

The square root of 64568543 is about 8035.4553697970. The cubic root of 64568543 is about 401.1809744005.

The spelling of 64568543 in words is "sixty-four million, five hundred sixty-eight thousand, five hundred forty-three".