12165500055 has 16 divisors (see below), whose sum is σ = 20311096320. Its totient is φ = 6206167968.

The previous prime is 12165500051. The next prime is 12165500059. The reversal of 12165500055 is 55000556121.

It is an interprime number because it is at equal distance from previous prime (12165500051) and next prime (12165500059).

It is not a de Polignac number, because 12165500055 - 2² = 12165500051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12165499995 and 12165500031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165500051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17630815 + ... + 17631504.

It is an arithmetic number, because the mean of its divisors is an integer number (1269443520).

Almost surely, 2^12165500055 is an apocalyptic number.

12165500055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12165500055 is a deficient number, since it is larger than the sum of its proper divisors (8145596265).

12165500055 is a wasteful number, since it uses less digits than its factorization.

12165500055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35262350.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 12165500055 in words is "twelve billion, one hundred sixty-five million, five hundred thousand, fifty-five".