4921581328 has 80 divisors (see below), whose sum is σ = 10527183360. Its totient is φ = 2218752000.

The previous prime is 4921581323. The next prime is 4921581341. The reversal of 4921581328 is 8231851294.

It is not an unprimeable number, because it can be changed into a prime (4921581323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848743 + ... + 854521.

It is an arithmetic number, because the mean of its divisors is an integer number (131589792).

Almost surely, 2^4921581328 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 4921581328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5263591680).

4921581328 is an abundant number, since it is smaller than the sum of its proper divisors (5605602032).

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

4921581328 is a wasteful number, since it uses less digits than its factorization.

4921581328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936 (or 5930 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 4921581328 is about 70153.9829802984. The cubic root of 4921581328 is about 1700.9891968430.

The spelling of 4921581328 in words is "four billion, nine hundred twenty-one million, five hundred eighty-one thousand, three hundred twenty-eight".