5821721536 has 84 divisors (see below), whose sum is σ = 12374410608. Its totient is φ = 2708015104.

The previous prime is 5821721531. The next prime is 5821721557. The reversal of 5821721536 is 6351271285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821721531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32523495 + ... + 32523673.

It is an arithmetic number, because the mean of its divisors is an integer number (147314412).

Almost surely, 2^5821721536 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 5821721536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6187205304).

5821721536 is an abundant number, since it is smaller than the sum of its proper divisors (6552689072).

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

5821721536 is a wasteful number, since it uses less digits than its factorization.

5821721536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 365 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 5821721536 is about 76300.2066576494. The cubic root of 5821721536 is about 1798.9419230184.

The spelling of 5821721536 in words is "five billion, eight hundred twenty-one million, seven hundred twenty-one thousand, five hundred thirty-six".