63444641 has 8 divisors (see below), whose sum is σ = 68931240. Its totient is φ = 58044672.

The previous prime is 63444637. The next prime is 63444683. The reversal of 63444641 is 14644436.

It can be written as a sum of positive squares in 4 ways, for example, as 11662225 + 51782416 = 3415^2 + 7196^2 .

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 63444641 - 2² = 63444637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63444598 and 63444607.

It is not an unprimeable number, because it can be changed into a prime (63444611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20126 + ... + 23063.

It is an arithmetic number, because the mean of its divisors is an integer number (8616405).

Almost surely, 2^63444641 is an apocalyptic number.

It is an amenable number.

63444641 is a deficient number, since it is larger than the sum of its proper divisors (5486599).

63444641 is a wasteful number, since it uses less digits than its factorization.

63444641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43315.

The product of its digits is 27648, while the sum is 32.

The square root of 63444641 is about 7965.2144352804. The cubic root of 63444641 is about 398.8396392455.

The spelling of 63444641 in words is "sixty-three million, four hundred forty-four thousand, six hundred forty-one".