4509449968 has 80 divisors (see below), whose sum is σ = 9696522240. Its totient is φ = 2022969600.

The previous prime is 4509449963. The next prime is 4509449977. The reversal of 4509449968 is 8699449054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509449963) 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, 437838 + ... + 448018.

It is an arithmetic number, because the mean of its divisors is an integer number (121206528).

Almost surely, 2^4509449968 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 4509449968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4848261120).

4509449968 is an abundant number, since it is smaller than the sum of its proper divisors (5187072272).

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

4509449968 is a wasteful number, since it uses less digits than its factorization.

4509449968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10286 (or 10280 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The square root of 4509449968 is about 67152.4382878239. The cubic root of 4509449968 is about 1652.1184870468.

The spelling of 4509449968 in words is "four billion, five hundred nine million, four hundred forty-nine thousand, nine hundred sixty-eight".