217123062786272 has 24 divisors (see below), whose sum is σ = 427461369060096. Its totient is φ = 108561445247232.

The previous prime is 217123062786271. The next prime is 217123062786293. The reversal of 217123062786272 is 272687260321712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217123062786271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62707268 + ... + 66079100.

It is an arithmetic number, because the mean of its divisors is an integer number (17810890377504).

Almost surely, 2^{217123062786272} is an apocalyptic number.

It is an amenable number.

217123062786272 is a deficient number, since it is larger than the sum of its proper divisors (210338306273824).

217123062786272 is a wasteful number, since it uses less digits than its factorization.

217123062786272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384130 (or 5384122 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 56.

The spelling of 217123062786272 in words is "two hundred seventeen trillion, one hundred twenty-three billion, sixty-two million, seven hundred eighty-six thousand, two hundred seventy-two".