216650679552 has 108 divisors (see below), whose sum is σ = 646197426420. Its totient is φ = 69726633984.

The previous prime is 216650679551. The next prime is 216650679577. The reversal of 216650679552 is 255976056612.

216650679552 is a `hidden beast` number, since 2 + 1 + 66 + 506 + 79 + 5 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 149416263936 + 67234415616 = 386544^2 + 259296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216650679551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1554433 + ... + 1688064.

Almost surely, 2^216650679552 is an apocalyptic number.

It is an amenable number.

216650679552 is an abundant number, since it is smaller than the sum of its proper divisors (429546746868).

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

216650679552 is a wasteful number, since it uses less digits than its factorization.

216650679552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242548 (or 3242531 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The spelling of 216650679552 in words is "two hundred sixteen billion, six hundred fifty million, six hundred seventy-nine thousand, five hundred fifty-two".