5065721856 has 432 divisors, whose sum is σ = 16925535900. Its totient is φ = 1504935936.

The previous prime is 5065721851. The next prime is 5065721867. The reversal of 5065721856 is 6581275605.

It can be written as a sum of positive squares in 2 ways, for example, as 4897760256 + 167961600 = 69984^2 + 12960^2 .

It is a tau number, because it is divible by the number of its divisors (432).

It is not an unprimeable number, because it can be changed into a prime (5065721851) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 174680050 + ... + 174680078.

Almost surely, 2^5065721856 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 5065721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8462767950).

5065721856 is an abundant number, since it is smaller than the sum of its proper divisors (11859814044).

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

5065721856 is an frugal number, since it uses more digits than its factorization.

5065721856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 5065721856 is about 71173.8846487952. The cubic root of 5065721856 is about 1717.4355438140.

The spelling of 5065721856 in words is "five billion, sixty-five million, seven hundred twenty-one thousand, eight hundred fifty-six".