4489578641 has 2 divisors, whose sum is σ = 4489578642. Its totient is φ = 4489578640.

The previous prime is 4489578619. The next prime is 4489578719. The reversal of 4489578641 is 1468759844.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3217158400 + 1272420241 = 56720^2 + 35671^2 .

It is a cyclic number.

It is not a de Polignac number, because 4489578641 - 2³⁰ = 3415836817 is a prime.

It is not a weakly prime, because it can be changed into another prime (4489578241) 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 as a sum of consecutive naturals, namely, 2244789320 + 2244789321.

It is an arithmetic number, because the mean of its divisors is an integer number (2244789321).

Almost surely, 2^4489578641 is an apocalyptic number.

It is an amenable number.

4489578641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4489578641 is an equidigital number, since it uses as much as digits as its factorization.

4489578641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 56.

The square root of 4489578641 is about 67004.3180772702. The cubic root of 4489578641 is about 1649.6881738248.

The spelling of 4489578641 in words is "four billion, four hundred eighty-nine million, five hundred seventy-eight thousand, six hundred forty-one".