217413045664 has 24 divisors (see below), whose sum is σ = 428737131648. Its totient is φ = 108527424960.

The previous prime is 217413045649. The next prime is 217413045671. The reversal of 217413045664 is 466540314712.

It is a self number, because there is not a number n which added to its sum of digits gives 217413045664.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5577082 + ... + 5615929.

It is an arithmetic number, because the mean of its divisors is an integer number (17864047152).

Almost surely, 2^217413045664 is an apocalyptic number.

It is an amenable number.

217413045664 is a deficient number, since it is larger than the sum of its proper divisors (211324085984).

217413045664 is a wasteful number, since it uses less digits than its factorization.

217413045664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193628 (or 11193620 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 217413045664 in words is "two hundred seventeen billion, four hundred thirteen million, forty-five thousand, six hundred sixty-four".