216506930166 has 48 divisors (see below), whose sum is σ = 470934871056. Its totient is φ = 71886979008.

The previous prime is 216506930131. The next prime is 216506930179. The reversal of 216506930166 is 661039605612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4865916 + ... + 4910208.

It is an arithmetic number, because the mean of its divisors is an integer number (9811143147).

Almost surely, 2^216506930166 is an apocalyptic number.

216506930166 is an abundant number, since it is smaller than the sum of its proper divisors (254427940890).

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

216506930166 is a wasteful number, since it uses less digits than its factorization.

216506930166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45357 (or 45354 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 216506930166 in words is "two hundred sixteen billion, five hundred six million, nine hundred thirty thousand, one hundred sixty-six".