12444025520520 has 144 divisors (see below), whose sum is σ = 44453967355980. Its totient is φ = 3016733448960.

The previous prime is 12444025520489. The next prime is 12444025520543. The reversal of 12444025520520 is 2502552044421.

12444025520520 is a `hidden beast` number, since 1 + 2 + 4 + 440 + 2 + 5 + 5 + 205 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12316014698724 + 128010821796 = 3509418^2 + 357786^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142794199 + ... + 142881318.

Almost surely, 2^{12444025520520} is an apocalyptic number.

12444025520520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444025520520 is an abundant number, since it is smaller than the sum of its proper divisors (32009941835460).

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

12444025520520 is a wasteful number, since it uses less digits than its factorization.

12444025520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285675556 (or 285675538 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 12444025520520 its reverse (2502552044421), we get a palindrome (14946577564941).

The spelling of 12444025520520 in words is "twelve trillion, four hundred forty-four billion, twenty-five million, five hundred twenty thousand, five hundred twenty".