4444611921 has 12 divisors (see below), whose sum is σ = 6420587472. Its totient is φ = 2962801176.

The previous prime is 4444611911. The next prime is 4444611947. The reversal of 4444611921 is 1291164444.

It is a happy number.

4444611921 is a `hidden beast` number, since 4 + 4 + 4 + 461 + 192 + 1 = 666.

It is not a de Polignac number, because 4444611921 - 2⁵ = 4444611889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4444611911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145810 + ... + 173636.

It is an arithmetic number, because the mean of its divisors is an integer number (535048956).

Almost surely, 2^4444611921 is an apocalyptic number.

It is an amenable number.

4444611921 is a deficient number, since it is larger than the sum of its proper divisors (1975975551).

4444611921 is a wasteful number, since it uses less digits than its factorization.

4444611921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45580 (or 45577 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 4444611921 is about 66667.9227290006. The cubic root of 4444611921 is about 1644.1620342628.

The spelling of 4444611921 in words is "four billion, four hundred forty-four million, six hundred eleven thousand, nine hundred twenty-one".