1225574824644 has 192 divisors, whose sum is σ = 3304803532800. Its totient is φ = 392489121024.

The previous prime is 1225574824637. The next prime is 1225574824667. The reversal of 1225574824644 is 4464284755221.

1225574824644 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 574 + 8 + 2 + 4 + 64 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 129836877 + ... + 129846315.

It is an arithmetic number, because the mean of its divisors is an integer number (17212518400).

Almost surely, 2^{1225574824644} 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 1225574824644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652401766400).

1225574824644 is an abundant number, since it is smaller than the sum of its proper divisors (2079228708156).

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

1225574824644 is a wasteful number, since it uses less digits than its factorization.

1225574824644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9951 (or 9943 counting only the distinct ones).

The product of its digits is 17203200, while the sum is 54.

The spelling of 1225574824644 in words is "one trillion, two hundred twenty-five billion, five hundred seventy-four million, eight hundred twenty-four thousand, six hundred forty-four".