221676753464445 has 16 divisors (see below), whose sum is σ = 354684261696192. Its totient is φ = 118227116463360.

The previous prime is 221676753464437. The next prime is 221676753464447. The reversal of 221676753464445 is 544464357676122.

It is a happy number.

It is not a de Polignac number, because 221676753464445 - 2³ = 221676753464437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221676753464447) 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, 26545827 + ... + 33882656.

It is an arithmetic number, because the mean of its divisors is an integer number (22167766356012).

Almost surely, 2^{221676753464445} is an apocalyptic number.

It is an amenable number.

221676753464445 is a deficient number, since it is larger than the sum of its proper divisors (133007508231747).

221676753464445 is a wasteful number, since it uses less digits than its factorization.

221676753464445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60673052.

The product of its digits is 812851200, while the sum is 66.

The spelling of 221676753464445 in words is "two hundred twenty-one trillion, six hundred seventy-six billion, seven hundred fifty-three million, four hundred sixty-four thousand, four hundred forty-five".