4440612321 has 8 divisors (see below), whose sum is σ = 6578684960. Its totient is φ = 2960408196.

The previous prime is 4440612317. The next prime is 4440612343. The reversal of 4440612321 is 1232160444.

It is a happy number.

4440612321 is a `hidden beast` number, since 4 + 4 + 40 + 612 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 4440612321 - 2² = 4440612317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 164467123 = 4440612321 / (4 + 4 + 4 + 0 + 6 + 1 + 2 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4440612301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82233535 + ... + 82233588.

It is an arithmetic number, because the mean of its divisors is an integer number (822335620).

Almost surely, 2^4440612321 is an apocalyptic number.

It is an amenable number.

4440612321 is a deficient number, since it is larger than the sum of its proper divisors (2138072639).

4440612321 is a wasteful number, since it uses less digits than its factorization.

4440612321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164467132 (or 164467126 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 4440612321 is about 66637.9195428549. The cubic root of 4440612321 is about 1643.6687055536.

Adding to 4440612321 its reverse (1232160444), we get a palindrome (5672772765).

The spelling of 4440612321 in words is "four billion, four hundred forty million, six hundred twelve thousand, three hundred twenty-one".