12655312155 has 32 divisors (see below), whose sum is σ = 23021560320. Its totient is φ = 6592531680.

The previous prime is 12655312151. The next prime is 12655312157. The reversal of 12655312155 is 55121355621.

12655312155 is a `hidden beast` number, since 12 + 65 + 531 + 2 + 1 + 55 = 666.

It is not a de Polignac number, because 12655312155 - 2² = 12655312151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12655312151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1084231 + ... + 1095840.

It is an arithmetic number, because the mean of its divisors is an integer number (719423760).

Almost surely, 2^12655312155 is an apocalyptic number.

12655312155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12655312155 is a deficient number, since it is larger than the sum of its proper divisors (10366248165).

12655312155 is a wasteful number, since it uses less digits than its factorization.

12655312155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180128 (or 2180122 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

Adding to 12655312155 its reverse (55121355621), we get a palindrome (67776667776).

The spelling of 12655312155 in words is "twelve billion, six hundred fifty-five million, three hundred twelve thousand, one hundred fifty-five".