4491563880 has 128 divisors (see below), whose sum is σ = 14309395200. Its totient is φ = 1123971072.

The previous prime is 4491563861. The next prime is 4491563887. The reversal of 4491563880 is 883651944.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4491563887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729294 + ... + 735426.

It is an arithmetic number, because the mean of its divisors is an integer number (111792150).

Almost surely, 2^4491563880 is an apocalyptic number.

4491563880 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 4491563880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7154697600).

4491563880 is an abundant number, since it is smaller than the sum of its proper divisors (9817831320).

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

4491563880 is a wasteful number, since it uses less digits than its factorization.

4491563880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523 (or 6519 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 4491563880 is about 67019.1307016138. The cubic root of 4491563880 is about 1649.9312955782.

The spelling of 4491563880 in words is "four billion, four hundred ninety-one million, five hundred sixty-three thousand, eight hundred eighty".