216677216196 has 81 divisors (see below), whose sum is σ = 637191687951. Its totient is φ = 61902190224.

The previous prime is 216677216159. The next prime is 216677216201. The reversal of 216677216196 is 691612776612.

The square root of 216677216196 is 465486.

It is a perfect power (a square), and thus also a powerful number.

216677216196 is a `hidden beast` number, since 2 + 16 + 6 + 7 + 7 + 2 + 1 + 619 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19544871 + ... + 19555953.

Almost surely, 2^216677216196 is an apocalyptic number.

216677216196 is the 465486-th square number.

It is an amenable number.

216677216196 is an abundant number, since it is smaller than the sum of its proper divisors (420514471755).

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

216677216196 is an equidigital number, since it uses as much as digits as its factorization.

216677216196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22190 (or 11095 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 216677216196 in words is "two hundred sixteen billion, six hundred seventy-seven million, two hundred sixteen thousand, one hundred ninety-six".