243404222566 has 16 divisors (see below), whose sum is σ = 378515546640. Its totient is φ = 117250581280.

The previous prime is 243404222563. The next prime is 243404222629. The reversal of 243404222566 is 665222404342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243404222563) 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, 4524916 + ... + 4578391.

It is an arithmetic number, because the mean of its divisors is an integer number (23657221665).

Almost surely, 2^243404222566 is an apocalyptic number.

243404222566 is a deficient number, since it is larger than the sum of its proper divisors (135111324074).

243404222566 is a wasteful number, since it uses less digits than its factorization.

243404222566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103799.

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 243404222566 in words is "two hundred forty-three billion, four hundred four million, two hundred twenty-two thousand, five hundred sixty-six".