221558385164 has 24 divisors (see below), whose sum is σ = 418536084960. Its totient is φ = 102308818304.

The previous prime is 221558385151. The next prime is 221558385197. The reversal of 221558385164 is 461583855122.

221558385164 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41518769 + ... + 41524104.

It is an arithmetic number, because the mean of its divisors is an integer number (17439003540).

Almost surely, 2^221558385164 is an apocalyptic number.

It is an amenable number.

221558385164 is a deficient number, since it is larger than the sum of its proper divisors (196977699796).

221558385164 is a wasteful number, since it uses less digits than its factorization.

221558385164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83042929 (or 83042927 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 50.

The spelling of 221558385164 in words is "two hundred twenty-one billion, five hundred fifty-eight million, three hundred eighty-five thousand, one hundred sixty-four".