2191568832 has 112 divisors (see below), whose sum is σ = 6782003200. Its totient is φ = 692064000.

The previous prime is 2191568791. The next prime is 2191568837. The reversal of 2191568832 is 2388651912.

2191568832 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 568 + 83 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191568837) 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, 544 + ... + 66207.

It is an arithmetic number, because the mean of its divisors is an integer number (60553600).

Almost surely, 2^2191568832 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 2191568832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3391001600).

2191568832 is an abundant number, since it is smaller than the sum of its proper divisors (4590434368).

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

2191568832 is a wasteful number, since it uses less digits than its factorization.

2191568832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66791 (or 66775 counting only the distinct ones).

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

The square root of 2191568832 is about 46814.1947703899. The cubic root of 2191568832 is about 1298.9278797652.

The spelling of 2191568832 in words is "two billion, one hundred ninety-one million, five hundred sixty-eight thousand, eight hundred thirty-two".