216177648912 has 120 divisors (see below), whose sum is σ = 619517069600. Its totient is φ = 70332240384.

The previous prime is 216177648889. The next prime is 216177648917. The reversal of 216177648912 is 219846771612.

216177648912 is a `hidden beast` number, since 2 + 1 + 617 + 7 + 6 + 4 + 8 + 9 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (216177648917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9022164 + ... + 9046092.

Almost surely, 2^216177648912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216177648912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309758534800).

216177648912 is an abundant number, since it is smaller than the sum of its proper divisors (403339420688).

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

216177648912 is a wasteful number, since it uses less digits than its factorization.

216177648912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25445 (or 25436 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The spelling of 216177648912 in words is "two hundred sixteen billion, one hundred seventy-seven million, six hundred forty-eight thousand, nine hundred twelve".