12056556553139 has 4 divisors (see below), whose sum is σ = 13778921775024. Its totient is φ = 10334191331256.

The previous prime is 12056556553109. The next prime is 12056556553163. The reversal of 12056556553139 is 93135565565021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12056556553139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12056556553109) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 861182610932 + ... + 861182610945.

It is an arithmetic number, because the mean of its divisors is an integer number (3444730443756).

Almost surely, 2^{12056556553139} is an apocalyptic number.

12056556553139 is a deficient number, since it is larger than the sum of its proper divisors (1722365221885).

12056556553139 is an equidigital number, since it uses as much as digits as its factorization.

12056556553139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722365221884.

The product of its (nonzero) digits is 18225000, while the sum is 56.

The spelling of 12056556553139 in words is "twelve trillion, fifty-six billion, five hundred fifty-six million, five hundred fifty-three thousand, one hundred thirty-nine".