2169216448 has 56 divisors (see below), whose sum is σ = 4928872032. Its totient is φ = 927888384.

The previous prime is 2169216431. The next prime is 2169216449. The reversal of 2169216448 is 8446129612.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169216449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 245190 + ... + 253882.

It is an arithmetic number, because the mean of its divisors is an integer number (88015572).

Almost surely, 2^2169216448 is an apocalyptic number.

2169216448 is a gapful number since it is divisible by the number (28) 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 2169216448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464436016).

2169216448 is an abundant number, since it is smaller than the sum of its proper divisors (2759655584).

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

2169216448 is an equidigital number, since it uses as much as digits as its factorization.

2169216448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269 (or 9259 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 2169216448 is about 46574.8478043675. The cubic root of 2169216448 is about 1294.4967455649.

The spelling of 2169216448 in words is "two billion, one hundred sixty-nine million, two hundred sixteen thousand, four hundred forty-eight".