4581969920 has 234 divisors, whose sum is σ = 12373439274. Its totient is φ = 1627422720.

The previous prime is 4581969857. The next prime is 4581969923. The reversal of 4581969920 is 299691854.

It can be written as a sum of positive squares in only one way, i.e., 3665575936 + 916393984 = 60544^2 + 30272^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4581969923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 106557419 + ... + 106557461.

Almost surely, 2^4581969920 is an apocalyptic number.

4581969920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4581969920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6186719637).

4581969920 is an abundant number, since it is smaller than the sum of its proper divisors (7791469354).

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

4581969920 is an equidigital number, since it uses as much as digits as its factorization.

4581969920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 53.

The square root of 4581969920 is about 67690.2498148736. The cubic root of 4581969920 is about 1660.9277631845.

The spelling of 4581969920 in words is "four billion, five hundred eighty-one million, nine hundred sixty-nine thousand, nine hundred twenty".