221656433525164 has 48 divisors (see below), whose sum is σ = 423345836261376. Its totient is φ = 100709224819200.

The previous prime is 221656433525119. The next prime is 221656433525167. The reversal of 221656433525164 is 461525334656122.

It is not an unprimeable number, because it can be changed into a prime (221656433525167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3563176149 + ... + 3563238355.

It is an arithmetic number, because the mean of its divisors is an integer number (8819704922112).

Almost surely, 2^{221656433525164} is an apocalyptic number.

It is an amenable number.

221656433525164 is a deficient number, since it is larger than the sum of its proper divisors (201689402736212).

221656433525164 is a wasteful number, since it uses less digits than its factorization.

221656433525164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96046 (or 96044 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 55.

The spelling of 221656433525164 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred thirty-three million, five hundred twenty-five thousand, one hundred sixty-four".