4434016721 has 4 divisors (see below), whose sum is σ = 4694841252. Its totient is φ = 4173192192.

The previous prime is 4434016711. The next prime is 4434016733. The reversal of 4434016721 is 1276104344.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1796064400 + 2637952321 = 42380^2 + 51361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4434016721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4434016711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130412240 + ... + 130412273.

It is an arithmetic number, because the mean of its divisors is an integer number (1173710313).

Almost surely, 2^4434016721 is an apocalyptic number.

It is an amenable number.

4434016721 is a deficient number, since it is larger than the sum of its proper divisors (260824531).

4434016721 is a wasteful number, since it uses less digits than its factorization.

4434016721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260824530.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 4434016721 is about 66588.4128133416. The cubic root of 4434016721 is about 1642.8545270651.

The spelling of 4434016721 in words is "four billion, four hundred thirty-four million, sixteen thousand, seven hundred twenty-one".