225644388668 has 12 divisors (see below), whose sum is σ = 397242218352. Its totient is φ = 112146612000.

The previous prime is 225644388653. The next prime is 225644388691. The reversal of 225644388668 is 866883446522.

It is a self number, because there is not a number n which added to its sum of digits gives 225644388668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168894833 + ... + 168896168.

It is an arithmetic number, because the mean of its divisors is an integer number (33103518196).

Almost surely, 2^225644388668 is an apocalyptic number.

It is an amenable number.

225644388668 is a deficient number, since it is larger than the sum of its proper divisors (171597829684).

225644388668 is a wasteful number, since it uses less digits than its factorization.

225644388668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337791172 (or 337791170 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 62.

The spelling of 225644388668 in words is "two hundred twenty-five billion, six hundred forty-four million, three hundred eighty-eight thousand, six hundred sixty-eight".