12634663155 has 32 divisors (see below), whose sum is σ = 20590018560. Its totient is φ = 6614624640.

The previous prime is 12634663127. The next prime is 12634663157. The reversal of 12634663155 is 55136643621.

It is not a de Polignac number, because 12634663155 - 2⁶ = 12634663091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12634663157) 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, 174190 + ... + 235820.

It is an arithmetic number, because the mean of its divisors is an integer number (643438080).

Almost surely, 2^12634663155 is an apocalyptic number.

12634663155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12634663155 is a deficient number, since it is larger than the sum of its proper divisors (7955355405).

12634663155 is a wasteful number, since it uses less digits than its factorization.

12634663155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61891.

The product of its digits is 388800, while the sum is 42.

It can be divided in two parts, 1263466 and 3155, that added together give a palindrome (1266621).

The spelling of 12634663155 in words is "twelve billion, six hundred thirty-four million, six hundred sixty-three thousand, one hundred fifty-five".