64205543 has 2 divisors, whose sum is σ = 64205544. Its totient is φ = 64205542.

The previous prime is 64205527. The next prime is 64205551. The reversal of 64205543 is 34550246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64205543 - 2⁴ = 64205527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64205573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32102771 + 32102772.

It is an arithmetic number, because the mean of its divisors is an integer number (32102772).

Almost surely, 2^64205543 is an apocalyptic number.

64205543 is a deficient number, since it is larger than the sum of its proper divisors (1).

64205543 is an equidigital number, since it uses as much as digits as its factorization.

64205543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 64205543 is about 8012.8361395950. The cubic root of 64205543 is about 400.4277569802.

Adding to 64205543 its reverse (34550246), we get a palindrome (98755789).

The spelling of 64205543 in words is "sixty-four million, two hundred five thousand, five hundred forty-three".