217416853612 has 48 divisors (see below), whose sum is σ = 440879765760. Its totient is φ = 91887187392.

The previous prime is 217416853579. The next prime is 217416853631. The reversal of 217416853612 is 216358614712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1185714 + ... + 1356742.

It is an arithmetic number, because the mean of its divisors is an integer number (9184995120).

Almost surely, 2^217416853612 is an apocalyptic number.

It is an amenable number.

217416853612 is an abundant number, since it is smaller than the sum of its proper divisors (223462912148).

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

217416853612 is a wasteful number, since it uses less digits than its factorization.

217416853612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171670 (or 171668 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The spelling of 217416853612 in words is "two hundred seventeen billion, four hundred sixteen million, eight hundred fifty-three thousand, six hundred twelve".