1225445563044 has 72 divisors (see below), whose sum is σ = 3167534418048. Its totient is φ = 399288692160.

The previous prime is 1225445563039. The next prime is 1225445563051. The reversal of 1225445563044 is 4403655445221.

It is a happy number.

1225445563044 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 4 + 4 + 5 + 5 + 630 + 4 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 894159 + ... + 1802889.

It is an arithmetic number, because the mean of its divisors is an integer number (43993533584).

Almost surely, 2^{1225445563044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225445563044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583767209024).

1225445563044 is an abundant number, since it is smaller than the sum of its proper divisors (1942088855004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225445563044 is a wasteful number, since it uses less digits than its factorization.

1225445563044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909585 (or 909580 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

The spelling of 1225445563044 in words is "one trillion, two hundred twenty-five billion, four hundred forty-five million, five hundred sixty-three thousand, forty-four".