535661556208668 has 72 divisors (see below), whose sum is σ = 1355785809945840. Its totient is φ = 178322905716480.

The previous prime is 535661556208607. The next prime is 535661556208703. The reversal of 535661556208668 is 866802655166535.

535661556208668 is a `hidden beast` number, since 5 + 3 + 5 + 6 + 6 + 1 + 556 + 2 + 0 + 8 + 6 + 68 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 535661556208596 and 535661556208605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86617146 + ... + 92595102.

It is an arithmetic number, because the mean of its divisors is an integer number (18830358471470).

Almost surely, 2^{535661556208668} is an apocalyptic number.

It is an amenable number.

535661556208668 is an abundant number, since it is smaller than the sum of its proper divisors (820124253737172).

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

535661556208668 is a wasteful number, since it uses less digits than its factorization.

535661556208668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981187 (or 5981182 counting only the distinct ones).

The product of its (nonzero) digits is 1866240000, while the sum is 72.

The spelling of 535661556208668 in words is "five hundred thirty-five trillion, six hundred sixty-one billion, five hundred fifty-six million, two hundred eight thousand, six hundred sixty-eight".