5991625728 has 396 divisors, whose sum is σ = 19819872800. Its totient is φ = 1806520320.

The previous prime is 5991625723. The next prime is 5991625811. The reversal of 5991625728 is 8275261995.

5991625728 is a `hidden beast` number, since 5 + 9 + 9 + 1 + 62 + 572 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (396).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991625723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30108573 + ... + 30108771.

Almost surely, 2^5991625728 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 5991625728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9909936400).

5991625728 is an abundant number, since it is smaller than the sum of its proper divisors (13828247072).

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

5991625728 is a wasteful number, since it uses less digits than its factorization.

5991625728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 215 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 5991625728 is about 77405.5923561082. The cubic root of 5991625728 is about 1816.2748068799.

The spelling of 5991625728 in words is "five billion, nine hundred ninety-one million, six hundred twenty-five thousand, seven hundred twenty-eight".