441216561 has 8 divisors (see below), whose sum is σ = 588834304. Its totient is φ = 293871600.

The previous prime is 441216553. The next prime is 441216571. The reversal of 441216561 is 165612144.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 441216561 - 2³ = 441216553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441216551) 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, 64390 + ... + 70911.

It is an arithmetic number, because the mean of its divisors is an integer number (73604288).

Almost surely, 2^441216561 is an apocalyptic number.

It is an amenable number.

441216561 is a deficient number, since it is larger than the sum of its proper divisors (147617743).

441216561 is a wasteful number, since it uses less digits than its factorization.

441216561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136391.

The product of its digits is 5760, while the sum is 30.

The square root of 441216561 is about 21005.1555814281. The cubic root of 441216561 is about 761.2908355175.

The spelling of 441216561 in words is "four hundred forty-one million, two hundred sixteen thousand, five hundred sixty-one".