221407345744448 has 56 divisors (see below), whose sum is σ = 441580100047584. Its totient is φ = 110144430950400.

The previous prime is 221407345744447. The next prime is 221407345744451. The reversal of 221407345744448 is 844447543704122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221407345744447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241865 + ... + 21044552.

Almost surely, 2^{221407345744448} is an apocalyptic number.

It is an amenable number.

221407345744448 is a deficient number, since it is larger than the sum of its proper divisors (220172754303136).

221407345744448 is a wasteful number, since it uses less digits than its factorization.

221407345744448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21287251 (or 21287241 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 59.

The spelling of 221407345744448 in words is "two hundred twenty-one trillion, four hundred seven billion, three hundred forty-five million, seven hundred forty-four thousand, four hundred forty-eight".