4978854721 has 9 divisors (see below), whose sum is σ = 5106219049. Its totient is φ = 4854596800.

The previous prime is 4978854707. The next prime is 4978854731. The reversal of 4978854721 is 1274588794.

The square root of 4978854721 is 70561.

It is a perfect power (a square), and thus also a powerful number.

4978854721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 479128321 + 4499726400 = 21889^2 + 67080^2 .

It is not a de Polignac number, because 4978854721 - 2¹¹ = 4978852673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4978854731) 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 in 8 ways as a sum of consecutive naturals, for example, 2892141 + ... + 2893861.

Almost surely, 2^4978854721 is an apocalyptic number.

4978854721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4978854721 is the 70561-st square number.

4978854721 is the 35281-st centered octagonal number.

It is an amenable number.

4978854721 is a deficient number, since it is larger than the sum of its proper divisors (127364328).

4978854721 is an frugal number, since it uses more digits than its factorization.

4978854721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524 (or 1762 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The cubic root of 4978854721 is about 1707.5620126864.

The spelling of 4978854721 in words is "four billion, nine hundred seventy-eight million, eight hundred fifty-four thousand, seven hundred twenty-one".