2164945244 has 72 divisors (see below), whose sum is σ = 4831666560. Its totient is φ = 839311200.

The previous prime is 2164945243. The next prime is 2164945259. The reversal of 2164945244 is 4425494612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164945243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452537 + ... + 457295.

It is an arithmetic number, because the mean of its divisors is an integer number (67106480).

Almost surely, 2^2164945244 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 2164945244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2415833280).

2164945244 is an abundant number, since it is smaller than the sum of its proper divisors (2666721316).

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

2164945244 is a wasteful number, since it uses less digits than its factorization.

2164945244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999 (or 4990 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 2164945244 is about 46528.9720926650. The cubic root of 2164945244 is about 1293.6465626063.

The spelling of 2164945244 in words is "two billion, one hundred sixty-four million, nine hundred forty-five thousand, two hundred forty-four".