2189566080 has 672 divisors, whose sum is σ = 8919994860. Its totient is φ = 510603264.

The previous prime is 2189566073. The next prime is 2189566139. The reversal of 2189566080 is 806659812.

2189566080 is a `hidden beast` number, since 2 + 1 + 8 + 9 + 566 + 0 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2037980736 + 151585344 = 45144^2 + 12312^2 .

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 83 ways as a sum of consecutive naturals, for example, 115240311 + ... + 115240329.

Almost surely, 2^2189566080 is an apocalyptic number.

2189566080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189566080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459997430).

2189566080 is an abundant number, since it is smaller than the sum of its proper divisors (6730428780).

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

2189566080 is an equidigital number, since it uses as much as digits as its factorization.

2189566080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 2189566080 is about 46792.7994460686. The cubic root of 2189566080 is about 1298.5320866986.

The spelling of 2189566080 in words is "two billion, one hundred eighty-nine million, five hundred sixty-six thousand, eighty".