1243144004445 has 120 divisors (see below), whose sum is σ = 2647436292864. Its totient is φ = 556202614464.

The previous prime is 1243144004413. The next prime is 1243144004461. The reversal of 1243144004445 is 5444004413421.

1243144004445 is a `hidden beast` number, since 1 + 243 + 1 + 4 + 400 + 4 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 1243144004445 - 2⁵ = 1243144004413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 266304 + ... + 1599126.

Almost surely, 2^{1243144004445} is an apocalyptic number.

1243144004445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243144004445 is an abundant number, since it is smaller than the sum of its proper divisors (1404292288419).

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

1243144004445 is a wasteful number, since it uses less digits than its factorization.

1243144004445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332901 (or 1332885 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 1243144004445 its reverse (5444004413421), we get a palindrome (6687148417866).

The spelling of 1243144004445 in words is "one trillion, two hundred forty-three billion, one hundred forty-four million, four thousand, four hundred forty-five".