4065644472 has 64 divisors (see below), whose sum is σ = 10712995200. Its totient is φ = 1282216320.

The previous prime is 4065644467. The next prime is 4065644483. The reversal of 4065644472 is 2744465604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371722 + ... + 382502.

It is an arithmetic number, because the mean of its divisors is an integer number (167390550).

Almost surely, 2^4065644472 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 4065644472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5356497600).

4065644472 is an abundant number, since it is smaller than the sum of its proper divisors (6647350728).

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

4065644472 is a wasteful number, since it uses less digits than its factorization.

4065644472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11636 (or 11632 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 42.

The square root of 4065644472 is about 63762.4064163203. The cubic root of 4065644472 is about 1596.0376527696.

The spelling of 4065644472 in words is "four billion, sixty-five million, six hundred forty-four thousand, four hundred seventy-two".