5721064128 has 448 divisors, whose sum is σ = 19540362240. Its totient is φ = 1625702400.

The previous prime is 5721064121. The next prime is 5721064147. The reversal of 5721064128 is 8214601275.

5721064128 is a `hidden beast` number, since 5 + 7 + 2 + 1 + 0 + 641 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5721064092 and 5721064101.

It is not an unprimeable number, because it can be changed into a prime (5721064121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27113943 + ... + 27114153.

It is an arithmetic number, because the mean of its divisors is an integer number (43616880).

Almost surely, 2^5721064128 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 5721064128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9770181120).

5721064128 is an abundant number, since it is smaller than the sum of its proper divisors (13819298112).

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

5721064128 is a wasteful number, since it uses less digits than its factorization.

5721064128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 5721064128 is about 75637.7163060863. The cubic root of 5721064128 is about 1788.5137031233.

The spelling of 5721064128 in words is "five billion, seven hundred twenty-one million, sixty-four thousand, one hundred twenty-eight".