217627366668 has 48 divisors (see below), whose sum is σ = 537736993920. Its totient is φ = 68266441984.

The previous prime is 217627366643. The next prime is 217627366669. The reversal of 217627366668 is 866663726712.

It is not an unprimeable number, because it can be changed into a prime (217627366669) 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 15 ways as a sum of consecutive naturals, for example, 1616863 + ... + 1746281.

It is an arithmetic number, because the mean of its divisors is an integer number (11202854040).

Almost surely, 2^217627366668 is an apocalyptic number.

It is an amenable number.

217627366668 is an abundant number, since it is smaller than the sum of its proper divisors (320109627252).

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

217627366668 is a wasteful number, since it uses less digits than its factorization.

217627366668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137686 (or 137684 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 60.

The spelling of 217627366668 in words is "two hundred seventeen billion, six hundred twenty-seven million, three hundred sixty-six thousand, six hundred sixty-eight".