5591728128 has 272 divisors, whose sum is σ = 18119255040. Its totient is φ = 1497366528.

The previous prime is 5591728123. The next prime is 5591728141. The reversal of 5591728128 is 8218271955.

It is a tau number, because it is divible by the number of its divisors (272).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (5591728123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23396233 + ... + 23396471.

Almost surely, 2^5591728128 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 5591728128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9059627520).

5591728128 is an abundant number, since it is smaller than the sum of its proper divisors (12527526912).

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

5591728128 is an equidigital number, since it uses as much as digits as its factorization.

5591728128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 268 counting only the distinct ones).

The product of its digits is 403200, while the sum is 48.

The square root of 5591728128 is about 74777.8585411484. The cubic root of 5591728128 is about 1774.9332121137.

The spelling of 5591728128 in words is "five billion, five hundred ninety-one million, seven hundred twenty-eight thousand, one hundred twenty-eight".