217630869086 has 16 divisors (see below), whose sum is σ = 338613951984. Its totient is φ = 104828883264.

The previous prime is 217630869067. The next prime is 217630869107. The reversal of 217630869086 is 680968036712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17326541 + ... + 17339096.

It is an arithmetic number, because the mean of its divisors is an integer number (21163371999).

Almost surely, 2^217630869086 is an apocalyptic number.

217630869086 is a deficient number, since it is larger than the sum of its proper divisors (120983082898).

217630869086 is a wasteful number, since it uses less digits than its factorization.

217630869086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34665755.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 217630869086 in words is "two hundred seventeen billion, six hundred thirty million, eight hundred sixty-nine thousand, eighty-six".