4978635648 has 64 divisors (see below), whose sum is σ = 15113723520. Its totient is φ = 1422466560.

The previous prime is 4978635601. The next prime is 4978635661. The reversal of 4978635648 is 8465368794.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 4978635591 and 4978635600.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 923398 + ... + 928773.

It is an arithmetic number, because the mean of its divisors is an integer number (236151930).

Almost surely, 2^4978635648 is an apocalyptic number.

4978635648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4978635648 is an abundant number, since it is smaller than the sum of its proper divisors (10135087872).

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

4978635648 is a wasteful number, since it uses less digits than its factorization.

4978635648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852195 (or 1852183 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 60.

The square root of 4978635648 is about 70559.4476168854. The cubic root of 4978635648 is about 1707.5369676884.

The spelling of 4978635648 in words is "four billion, nine hundred seventy-eight million, six hundred thirty-five thousand, six hundred forty-eight".