12663542511 has 10 divisors (see below), whose sum is σ = 18917143872. Its totient is φ = 8442361620.

The previous prime is 12663542497. The next prime is 12663542519. The reversal of 12663542511 is 11524536621.

12663542511 is a `hidden beast` number, since 1 + 2 + 6 + 63 + 542 + 51 + 1 = 666.

It is not a de Polignac number, because 12663542511 - 2⁶ = 12663542447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663542519) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78169935 + ... + 78170096.

Almost surely, 2^12663542511 is an apocalyptic number.

12663542511 is a deficient number, since it is larger than the sum of its proper divisors (6253601361).

12663542511 is an equidigital number, since it uses as much as digits as its factorization.

12663542511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156340043 (or 156340034 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 12663542511 in words is "twelve billion, six hundred sixty-three million, five hundred forty-two thousand, five hundred eleven".