2144546664 has 64 divisors (see below), whose sum is σ = 5809339200. Its totient is φ = 655796736.

The previous prime is 2144546641. The next prime is 2144546669. The reversal of 2144546664 is 4666454412.

It is not an unprimeable number, because it can be changed into a prime (2144546669) 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, 29772 + ... + 71940.

It is an arithmetic number, because the mean of its divisors is an integer number (90770925).

Almost surely, 2^2144546664 is an apocalyptic number.

2144546664 is a gapful number since it is divisible by the number (24) 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 2144546664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904669600).

2144546664 is an abundant number, since it is smaller than the sum of its proper divisors (3664792536).

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

2144546664 is a wasteful number, since it uses less digits than its factorization.

2144546664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42354 (or 42350 counting only the distinct ones).

The product of its digits is 552960, while the sum is 42.

The square root of 2144546664 is about 46309.2503070391. The cubic root of 2144546664 is about 1289.5707291110.

The spelling of 2144546664 in words is "two billion, one hundred forty-four million, five hundred forty-six thousand, six hundred sixty-four".