217543140675568 has 20 divisors (see below), whose sum is σ = 421580693110720. Its totient is φ = 108748123098624.

The previous prime is 217543140675557. The next prime is 217543140675583. The reversal of 217543140675568 is 865576041345712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1465375905 + ... + 1465524352.

It is an arithmetic number, because the mean of its divisors is an integer number (21079034655536).

Almost surely, 2^{217543140675568} is an apocalyptic number.

It is an amenable number.

217543140675568 is a deficient number, since it is larger than the sum of its proper divisors (204037552435152).

217543140675568 is a wasteful number, since it uses less digits than its factorization.

217543140675568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2930904904 (or 2930904898 counting only the distinct ones).

The product of its (nonzero) digits is 169344000, while the sum is 64.

The spelling of 217543140675568 in words is "two hundred seventeen trillion, five hundred forty-three billion, one hundred forty million, six hundred seventy-five thousand, five hundred sixty-eight".