4451355648 has 308 divisors, whose sum is σ = 13692710520. Its totient is φ = 1445216256.

The previous prime is 4451355647. The next prime is 4451355659. The reversal of 4451355648 is 8465531544.

4451355648 is a `hidden beast` number, since 4 + 4 + 51 + 3 + 556 + 48 = 666.

It is not an unprimeable number, because it can be changed into a prime (4451355647) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 50015188 + ... + 50015276.

Almost surely, 2^4451355648 is an apocalyptic number.

4451355648 is a gapful number since it is divisible by the number (48) 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 4451355648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6846355260).

4451355648 is an abundant number, since it is smaller than the sum of its proper divisors (9241354872).

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

4451355648 is an frugal number, since it uses more digits than its factorization.

4451355648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 161 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 4451355648 is about 66718.4805582381. The cubic root of 4451355648 is about 1644.9931662087.

The spelling of 4451355648 in words is "four billion, four hundred fifty-one million, three hundred fifty-five thousand, six hundred forty-eight".