217517210672 has 10 divisors (see below), whose sum is σ = 421439595708. Its totient is φ = 108758605328.

The previous prime is 217517210671. The next prime is 217517210681. The reversal of 217517210672 is 276012715712.

It is not an unprimeable number, because it can be changed into a prime (217517210671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6797412818 + ... + 6797412849.

Almost surely, 2^217517210672 is an apocalyptic number.

It is an amenable number.

217517210672 is a deficient number, since it is larger than the sum of its proper divisors (203922385036).

217517210672 is a wasteful number, since it uses less digits than its factorization.

217517210672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594825675 (or 13594825669 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 217517210672 in words is "two hundred seventeen billion, five hundred seventeen million, two hundred ten thousand, six hundred seventy-two".