12154320266 has 16 divisors (see below), whose sum is σ = 20010911328. Its totient is φ = 5490795600.

The previous prime is 12154320259. The next prime is 12154320271. The reversal of 12154320266 is 66202345121.

12154320266 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12154320266² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691105 + ... + 1698276.

It is an arithmetic number, because the mean of its divisors is an integer number (1250681958).

Almost surely, 2^12154320266 is an apocalyptic number.

12154320266 is a deficient number, since it is larger than the sum of its proper divisors (7856591062).

12154320266 is a wasteful number, since it uses less digits than its factorization.

12154320266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389557.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 12154320266 its reverse (66202345121), we get a palindrome (78356665387).

The spelling of 12154320266 in words is "twelve billion, one hundred fifty-four million, three hundred twenty thousand, two hundred sixty-six".