217803465368 has 16 divisors (see below), whose sum is σ = 408389182080. Its totient is φ = 108899683488.

The previous prime is 217803465361. The next prime is 217803465413. The reversal of 217803465368 is 863564308712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217803465361) 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, 255746 + ... + 707822.

It is an arithmetic number, because the mean of its divisors is an integer number (25524323880).

Almost surely, 2^217803465368 is an apocalyptic number.

It is an amenable number.

217803465368 is a deficient number, since it is larger than the sum of its proper divisors (190585716712).

217803465368 is a wasteful number, since it uses less digits than its factorization.

217803465368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512306 (or 512302 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 217803465368 in words is "two hundred seventeen billion, eight hundred three million, four hundred sixty-five thousand, three hundred sixty-eight".