216603221566350 has 96 divisors (see below), whose sum is σ = 560538523238400. Its totient is φ = 55248821907840.

The previous prime is 216603221566331. The next prime is 216603221566351. The reversal of 216603221566350 is 53665122306612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216603221566350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216603221566351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308766192 + ... + 309466908.

It is an arithmetic number, because the mean of its divisors is an integer number (5838942950400).

Almost surely, 2^{216603221566350} is an apocalyptic number.

216603221566350 is an abundant number, since it is smaller than the sum of its proper divisors (343935301672050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216603221566350 is a wasteful number, since it uses less digits than its factorization.

216603221566350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790354 (or 790349 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 216603221566350 in words is "two hundred sixteen trillion, six hundred three billion, two hundred twenty-one million, five hundred sixty-six thousand, three hundred fifty".