64424641 has 4 divisors (see below), whose sum is σ = 64484784. Its totient is φ = 64364500.

The previous prime is 64424623. The next prime is 64424651. The reversal of 64424641 is 14642446.

64424641 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64424641 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64424651) 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, 28435 + ... + 30616.

It is an arithmetic number, because the mean of its divisors is an integer number (16121196).

Almost surely, 2^64424641 is an apocalyptic number.

It is an amenable number.

64424641 is a deficient number, since it is larger than the sum of its proper divisors (60143).

64424641 is a wasteful number, since it uses less digits than its factorization.

64424641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60142.

The product of its digits is 18432, while the sum is 31.

The square root of 64424641 is about 8026.4961845129. The cubic root of 64424641 is about 400.8827193335.

The spelling of 64424641 in words is "sixty-four million, four hundred twenty-four thousand, six hundred forty-one".