5591165580 has 972 divisors, whose sum is σ = 24239307456. Its totient is φ = 1037836800.

The previous prime is 5591165579. The next prime is 5591165597. The reversal of 5591165580 is 855611955.

5591165580 is a `hidden beast` number, since 5 + 5 + 9 + 1 + 1 + 65 + 580 = 666.

It is a super-2 number, since 2×5591165580² = 62522265085953472800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 180360165 + ... + 180360195.

Almost surely, 2^5591165580 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 5591165580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12119653728).

5591165580 is an abundant number, since it is smaller than the sum of its proper divisors (18648141876).

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

5591165580 is a wasteful number, since it uses less digits than its factorization.

5591165580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 45.

The square root of 5591165580 is about 74774.0969855203. The cubic root of 5591165580 is about 1774.8736885585.

It can be divided in two parts, 5591 and 165580, that added together give a palindrome (171171).

The spelling of 5591165580 in words is "five billion, five hundred ninety-one million, one hundred sixty-five thousand, five hundred eighty".