216643600441 has 8 divisors (see below), whose sum is σ = 216826352064. Its totient is φ = 216460903920.

The previous prime is 216643600361. The next prime is 216643600469. The reversal of 216643600441 is 144006346612.

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

It is not a de Polignac number, because 216643600441 - 2²³ = 216635211833 is a prime.

It is a super-2 number, since 2×216643600441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216643600441.

It is not an unprimeable number, because it can be changed into a prime (216643600541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11938411 + ... + 11956543.

It is an arithmetic number, because the mean of its divisors is an integer number (27103294008).

Almost surely, 2^216643600441 is an apocalyptic number.

It is an amenable number.

216643600441 is a deficient number, since it is larger than the sum of its proper divisors (182751623).

216643600441 is a wasteful number, since it uses less digits than its factorization.

216643600441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27551.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 216643600441 in words is "two hundred sixteen billion, six hundred forty-three million, six hundred thousand, four hundred forty-one".