4978878816 has 48 divisors (see below), whose sum is σ = 13637804544. Its totient is φ = 1587467904.

The previous prime is 4978878803. The next prime is 4978878869. The reversal of 4978878816 is 6188788794.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1125256 + ... + 1129671.

It is an arithmetic number, because the mean of its divisors is an integer number (284120928).

Almost surely, 2^4978878816 is an apocalyptic number.

4978878816 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

4978878816 is an abundant number, since it is smaller than the sum of its proper divisors (8658925728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4978878816 is a wasteful number, since it uses less digits than its factorization.

4978878816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254963 (or 2254955 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 66.

The square root of 4978878816 is about 70561.1707385868. The cubic root of 4978878816 is about 1707.5647672449.

The spelling of 4978878816 in words is "four billion, nine hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred sixteen".