64522643 has 4 divisors (see below), whose sum is σ = 66096408. Its totient is φ = 62948880.

The previous prime is 64522631. The next prime is 64522649. The reversal of 64522643 is 34622546.

64522643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64522643 - 2⁸ = 64522387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64522649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786821 + ... + 786902.

It is an arithmetic number, because the mean of its divisors is an integer number (16524102).

Almost surely, 2^64522643 is an apocalyptic number.

64522643 is a deficient number, since it is larger than the sum of its proper divisors (1573765).

64522643 is a wasteful number, since it uses less digits than its factorization.

64522643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573764.

The product of its digits is 34560, while the sum is 32.

The square root of 64522643 is about 8032.5987700121. The cubic root of 64522643 is about 401.0858890283.

The spelling of 64522643 in words is "sixty-four million, five hundred twenty-two thousand, six hundred forty-three".