64224641 has 8 divisors (see below), whose sum is σ = 69671784. Its totient is φ = 58849920.

The previous prime is 64224631. The next prime is 64224689. The reversal of 64224641 is 14642246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 863041 + 63361600 = 929^2 + 7960^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64224641 - 2⁶ = 64224577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64224631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16250 + ... + 19811.

It is an arithmetic number, because the mean of its divisors is an integer number (8708973).

Almost surely, 2^64224641 is an apocalyptic number.

It is an amenable number.

64224641 is a deficient number, since it is larger than the sum of its proper divisors (5447143).

64224641 is a wasteful number, since it uses less digits than its factorization.

64224641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211.

The product of its digits is 9216, while the sum is 29.

The square root of 64224641 is about 8014.0277638651. The cubic root of 64224641 is about 400.4674555837.

Adding to 64224641 its reverse (14642246), we get a palindrome (78866887).

The spelling of 64224641 in words is "sixty-four million, two hundred twenty-four thousand, six hundred forty-one".