2489816578 has 8 divisors (see below), whose sum is σ = 3740961600. Its totient is φ = 1242829380.

The previous prime is 2489816561. The next prime is 2489816597. The reversal of 2489816578 is 8756189842.

It is a happy number.

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, 1037958 + ... + 1040353.

It is an arithmetic number, because the mean of its divisors is an integer number (467620200).

Almost surely, 2^2489816578 is an apocalyptic number.

2489816578 is a deficient number, since it is larger than the sum of its proper divisors (1251145022).

2489816578 is a wasteful number, since it uses less digits than its factorization.

2489816578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078912.

The product of its digits is 7741440, while the sum is 58.

The square root of 2489816578 is about 49898.0618661687. The cubic root of 2489816578 is about 1355.3634964747.

The spelling of 2489816578 in words is "two billion, four hundred eighty-nine million, eight hundred sixteen thousand, five hundred seventy-eight".