216377727228 has 36 divisors (see below), whose sum is σ = 589028258728. Its totient is φ = 66577762080.

The previous prime is 216377727191. The next prime is 216377727287. The reversal of 216377727228 is 822727773612.

216377727228 is a `hidden beast` number, since 21 + 6 + 377 + 7 + 27 + 228 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231172318 + ... + 231173253.

Almost surely, 2^216377727228 is an apocalyptic number.

It is an amenable number.

216377727228 is an abundant number, since it is smaller than the sum of its proper divisors (372650531500).

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

216377727228 is a wasteful number, since it uses less digits than its factorization.

216377727228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462345594 (or 462345589 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 54.

The spelling of 216377727228 in words is "two hundred sixteen billion, three hundred seventy-seven million, seven hundred twenty-seven thousand, two hundred twenty-eight".