12117916287155 has 32 divisors (see below), whose sum is σ = 17493802690560. Its totient is φ = 7871968748160.

The previous prime is 12117916287137. The next prime is 12117916287221. The reversal of 12117916287155 is 55178261971121.

It is a de Polignac number, because none of the positive numbers 2^k-12117916287155 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12117916287155.

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 31 ways as a sum of consecutive naturals, for example, 67761317 + ... + 67939913.

It is an arithmetic number, because the mean of its divisors is an integer number (546681334080).

Almost surely, 2^{12117916287155} is an apocalyptic number.

12117916287155 is a deficient number, since it is larger than the sum of its proper divisors (5375886403405).

12117916287155 is a wasteful number, since it uses less digits than its factorization.

12117916287155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280659.

The product of its digits is 2116800, while the sum is 56.

The spelling of 12117916287155 in words is "twelve trillion, one hundred seventeen billion, nine hundred sixteen million, two hundred eighty-seven thousand, one hundred fifty-five".