441664611 has 4 divisors (see below), whose sum is σ = 588886152. Its totient is φ = 294443072.

The previous prime is 441664549. The next prime is 441664627. The reversal of 441664611 is 116466144.

Added to its reverse (116466144) it gives a triangular number (558130755 = T₃₃₄₁₀).

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

It is a cyclic number.

It is not a de Polignac number, because 441664611 - 2²³ = 433276003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (441664631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73610766 + ... + 73610771.

It is an arithmetic number, because the mean of its divisors is an integer number (147221538).

Almost surely, 2^441664611 is an apocalyptic number.

441664611 is a deficient number, since it is larger than the sum of its proper divisors (147221541).

441664611 is a wasteful number, since it uses less digits than its factorization.

441664611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147221540.

The product of its digits is 13824, while the sum is 33.

The square root of 441664611 is about 21015.8181139826. The cubic root of 441664611 is about 761.5484421702.

Adding to 441664611 its reverse (116466144), we get a triangular number (558130755 = T₃₃₄₁₀).

The spelling of 441664611 in words is "four hundred forty-one million, six hundred sixty-four thousand, six hundred eleven".