216770164 has 48 divisors (see below), whose sum is σ = 433175680. Its totient is φ = 94089600.

The previous prime is 216770143. The next prime is 216770167. The reversal of 216770164 is 461077612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216770167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148462 + ... + 149914.

Almost surely, 2^216770164 is an apocalyptic number.

It is an amenable number.

216770164 is a deficient number, since it is larger than the sum of its proper divisors (216405516).

216770164 is a wasteful number, since it uses less digits than its factorization.

216770164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1638 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 216770164 is about 14723.1166537524. The cubic root of 216770164 is about 600.7122689352.

The spelling of 216770164 in words is "two hundred sixteen million, seven hundred seventy thousand, one hundred sixty-four".