221796975168 has 112 divisors (see below), whose sum is σ = 652286589760. Its totient is φ = 73904596992.

The previous prime is 221796975139. The next prime is 221796975229. The reversal of 221796975168 is 861579697122.

221796975168 is a `hidden beast` number, since 2 + 21 + 7 + 9 + 6 + 97 + 516 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4872771 + ... + 4918077.

Almost surely, 2^221796975168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221796975168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326143294880).

221796975168 is an abundant number, since it is smaller than the sum of its proper divisors (430489614592).

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

221796975168 is a wasteful number, since it uses less digits than its factorization.

221796975168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48161 (or 48145 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 221796975168 in words is "two hundred twenty-one billion, seven hundred ninety-six million, nine hundred seventy-five thousand, one hundred sixty-eight".