12555044378 has 4 divisors (see below), whose sum is σ = 18832566570. Its totient is φ = 6277522188.

The previous prime is 12555044377. The next prime is 12555044387. The reversal of 12555044378 is 87344055521.

12555044378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9235786609 + 3319257769 = 96103^2 + 57613^2 .

It is not an unprimeable number, because it can be changed into a prime (12555044377) by changing a digit.

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 as a sum of consecutive naturals, namely, 3138761093 + ... + 3138761096.

Almost surely, 2^12555044378 is an apocalyptic number.

12555044378 is a deficient number, since it is larger than the sum of its proper divisors (6277522192).

12555044378 is an equidigital number, since it uses as much as digits as its factorization.

12555044378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277522191.

The product of its (nonzero) digits is 672000, while the sum is 44.

Adding to 12555044378 its reverse (87344055521), we get a palindrome (99899099899).

The spelling of 12555044378 in words is "twelve billion, five hundred fifty-five million, forty-four thousand, three hundred seventy-eight".