12180156266 has 4 divisors (see below), whose sum is σ = 18270234402. Its totient is φ = 6090078132.

The previous prime is 12180156251. The next prime is 12180156323. The reversal of 12180156266 is 66265108121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66265108121 = 232417 ⋅285113.

It can be written as a sum of positive squares in only one way, i.e., 11546577025 + 633579241 = 107455^2 + 25171^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3045039065 + ... + 3045039068.

Almost surely, 2^12180156266 is an apocalyptic number.

12180156266 is a deficient number, since it is larger than the sum of its proper divisors (6090078136).

12180156266 is an equidigital number, since it uses as much as digits as its factorization.

12180156266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090078135.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 12180156266 in words is "twelve billion, one hundred eighty million, one hundred fifty-six thousand, two hundred sixty-six".