216420752086 has 32 divisors (see below), whose sum is σ = 404968958208. Its totient is φ = 84271014240.

The previous prime is 216420752069. The next prime is 216420752111. The reversal of 216420752086 is 680257024612.

It is a happy number.

It is a congruent number.

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, 138580 + ... + 672343.

It is an arithmetic number, because the mean of its divisors is an integer number (12655279944).

Almost surely, 2^216420752086 is an apocalyptic number.

216420752086 is a deficient number, since it is larger than the sum of its proper divisors (188548206122).

216420752086 is a wasteful number, since it uses less digits than its factorization.

216420752086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812676.

The product of its (nonzero) digits is 322560, while the sum is 43.

Adding to 216420752086 its reverse (680257024612), we get a palindrome (896677776698).

The spelling of 216420752086 in words is "two hundred sixteen billion, four hundred twenty million, seven hundred fifty-two thousand, eighty-six".