4451551020 has 576 divisors, whose sum is σ = 17086648320. Its totient is φ = 969978240.

The previous prime is 4451551009. The next prime is 4451551109. The reversal of 4451551020 is 201551544.

4451551020 is a `hidden beast` number, since 44 + 51 + 551 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 66441027 + ... + 66441093.

It is an arithmetic number, because the mean of its divisors is an integer number (29664320).

Almost surely, 2^4451551020 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 4451551020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8543324160).

4451551020 is an abundant number, since it is smaller than the sum of its proper divisors (12635097300).

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

4451551020 is a wasteful number, since it uses less digits than its factorization.

4451551020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4451551020 is about 66719.9446942217. The cubic root of 4451551020 is about 1645.0172323531.

The spelling of 4451551020 in words is "four billion, four hundred fifty-one million, five hundred fifty-one thousand, twenty".