5991791616 has 440 divisors, whose sum is σ = 19260141120. Its totient is φ = 1851752448.

The previous prime is 5991791579. The next prime is 5991791623. The reversal of 5991791616 is 6161971995.

It is a happy number.

5991791616 is a `hidden beast` number, since 5 + 9 + 9 + 17 + 9 + 1 + 616 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 113052646 + ... + 113052698.

It is an arithmetic number, because the mean of its divisors is an integer number (43773048).

Almost surely, 2^5991791616 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 5991791616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9630070560).

5991791616 is an abundant number, since it is smaller than the sum of its proper divisors (13268349504).

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

5991791616 is a wasteful number, since it uses less digits than its factorization.

5991791616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 134 counting only the distinct ones).

The product of its digits is 918540, while the sum is 54.

The square root of 5991791616 is about 77406.6638991760. The cubic root of 5991791616 is about 1816.2915689090.

The spelling of 5991791616 in words is "five billion, nine hundred ninety-one million, seven hundred ninety-one thousand, six hundred sixteen".