64643522 has 8 divisors (see below), whose sum is σ = 97705872. Its totient is φ = 32074900.

The previous prime is 64643519. The next prime is 64643531. The reversal of 64643522 is 22534646.

64643522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 123104 + ... + 123627.

It is an arithmetic number, because the mean of its divisors is an integer number (12213234).

Almost surely, 2^64643522 is an apocalyptic number.

64643522 is a deficient number, since it is larger than the sum of its proper divisors (33062350).

64643522 is a wasteful number, since it uses less digits than its factorization.

64643522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246864.

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

The square root of 64643522 is about 8040.1195264747. The cubic root of 64643522 is about 401.3362022718.

The spelling of 64643522 in words is "sixty-four million, six hundred forty-three thousand, five hundred twenty-two".