217285488632 has 8 divisors (see below), whose sum is σ = 407410291200. Its totient is φ = 108642744312.

The previous prime is 217285488587. The next prime is 217285488647. The reversal of 217285488632 is 236884582712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13580343032 + ... + 13580343047.

It is an arithmetic number, because the mean of its divisors is an integer number (50926286400).

Almost surely, 2^217285488632 is an apocalyptic number.

It is an amenable number.

217285488632 is a deficient number, since it is larger than the sum of its proper divisors (190124802568).

217285488632 is a wasteful number, since it uses less digits than its factorization.

217285488632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27160686085 (or 27160686081 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 56.

The spelling of 217285488632 in words is "two hundred seventeen billion, two hundred eighty-five million, four hundred eighty-eight thousand, six hundred thirty-two".