217798748832 has 96 divisors (see below), whose sum is σ = 653555976192. Its totient is φ = 62213001984.

The previous prime is 217798748737. The next prime is 217798748891. The reversal of 217798748832 is 238847897712.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870293 + ... + 2945195.

It is an arithmetic number, because the mean of its divisors is an integer number (6807874752).

Almost surely, 2^217798748832 is an apocalyptic number.

It is an amenable number.

217798748832 is an abundant number, since it is smaller than the sum of its proper divisors (435757227360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217798748832 is a wasteful number, since it uses less digits than its factorization.

217798748832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79250 (or 79242 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 66.

The spelling of 217798748832 in words is "two hundred seventeen billion, seven hundred ninety-eight million, seven hundred forty-eight thousand, eight hundred thirty-two".