4778138016 has 144 divisors (see below), whose sum is σ = 13855121280. Its totient is φ = 1561697280.

The previous prime is 4778138009. The next prime is 4778138021. The reversal of 4778138016 is 6108318774.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3357081 + ... + 3358503.

It is an arithmetic number, because the mean of its divisors is an integer number (96216120).

Almost surely, 2^4778138016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4778138016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6927560640).

4778138016 is an abundant number, since it is smaller than the sum of its proper divisors (9076983264).

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

4778138016 is a wasteful number, since it uses less digits than its factorization.

4778138016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 4778138016 is about 69124.0769630959. The cubic root of 4778138016 is about 1684.3004449618.

The spelling of 4778138016 in words is "four billion, seven hundred seventy-eight million, one hundred thirty-eight thousand, sixteen".