216506989196 has 24 divisors (see below), whose sum is σ = 386062089840. Its totient is φ = 106203810752.

The previous prime is 216506989141. The next prime is 216506989207. The reversal of 216506989196 is 691989605612.

It is a happy 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, 4552790 + ... + 4600098.

It is an arithmetic number, because the mean of its divisors is an integer number (16085920410).

Almost surely, 2^216506989196 is an apocalyptic number.

It is an amenable number.

216506989196 is a deficient number, since it is larger than the sum of its proper divisors (169555100644).

216506989196 is a wasteful number, since it uses less digits than its factorization.

216506989196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68953 (or 68951 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 62.

The spelling of 216506989196 in words is "two hundred sixteen billion, five hundred six million, nine hundred eighty-nine thousand, one hundred ninety-six".