4991778848 has 48 divisors (see below), whose sum is σ = 11275334784. Its totient is φ = 2130984960.

The previous prime is 4991778829. The next prime is 4991778851. The reversal of 4991778848 is 8488771994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14213 + ... + 100923.

It is an arithmetic number, because the mean of its divisors is an integer number (234902808).

Almost surely, 2^4991778848 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 4991778848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5637667392).

4991778848 is an abundant number, since it is smaller than the sum of its proper divisors (6283555936).

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

4991778848 is a wasteful number, since it uses less digits than its factorization.

4991778848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86985 (or 86977 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 65.

The square root of 4991778848 is about 70652.5218799726. The cubic root of 4991778848 is about 1709.0382344055.

The spelling of 4991778848 in words is "four billion, nine hundred ninety-one million, seven hundred seventy-eight thousand, eight hundred forty-eight".