221545366056 has 160 divisors (see below), whose sum is σ = 746505144000. Its totient is φ = 59967143424.

The previous prime is 221545365953. The next prime is 221545366127. The reversal of 221545366056 is 650663545122.

221545366056 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 4 + 5 + 36 + 605 + 6 = 666.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 1199121 + ... + 1371488.

It is an arithmetic number, because the mean of its divisors is an integer number (4665657150).

Almost surely, 2^221545366056 is an apocalyptic number.

It is an amenable number.

221545366056 is an abundant number, since it is smaller than the sum of its proper divisors (524959777944).

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

221545366056 is a wasteful number, since it uses less digits than its factorization.

221545366056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570653 (or 2570640 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 221545366056 in words is "two hundred twenty-one billion, five hundred forty-five million, three hundred sixty-six thousand, fifty-six".