217628308376 has 32 divisors (see below), whose sum is σ = 413244342000. Its totient is φ = 107435175936.

The previous prime is 217628308297. The next prime is 217628308379. The reversal of 217628308376 is 673803826712.

217628308376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217628308379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9521 + ... + 659808.

Almost surely, 2^217628308376 is an apocalyptic number.

It is an amenable number.

217628308376 is a deficient number, since it is larger than the sum of its proper divisors (195616033624).

217628308376 is a wasteful number, since it uses less digits than its factorization.

217628308376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669851 (or 669847 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 217628308376 in words is "two hundred seventeen billion, six hundred twenty-eight million, three hundred eight thousand, three hundred seventy-six".