4878678985 has 4 divisors (see below), whose sum is σ = 5854414788. Its totient is φ = 3902943184.

The previous prime is 4878678967. The next prime is 4878678997. The reversal of 4878678985 is 5898768784.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2551967289 + 2326711696 = 50517^2 + 48236^2 .

It is a cyclic number.

It is not a de Polignac number, because 4878678985 - 2⁵ = 4878678953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487867894 + ... + 487867903.

It is an arithmetic number, because the mean of its divisors is an integer number (1463603697).

Almost surely, 2^4878678985 is an apocalyptic number.

It is an amenable number.

4878678985 is a deficient number, since it is larger than the sum of its proper divisors (975735803).

4878678985 is an equidigital number, since it uses as much as digits as its factorization.

4878678985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975735802.

The product of its digits is 216760320, while the sum is 70.

The square root of 4878678985 is about 69847.5410089718. The cubic root of 4878678985 is about 1696.0321515549.

The spelling of 4878678985 in words is "four billion, eight hundred seventy-eight million, six hundred seventy-eight thousand, nine hundred eighty-five".