12635523611543 has 24 divisors (see below), whose sum is σ = 14786119464480. Its totient is φ = 10766016979200.

The previous prime is 12635523611539. The next prime is 12635523611563. The reversal of 12635523611543 is 34511632553621.

It is not a de Polignac number, because 12635523611543 - 2² = 12635523611539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12635523611533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5940878 + ... + 7782356.

It is an arithmetic number, because the mean of its divisors is an integer number (616088311020).

Almost surely, 2^{12635523611543} is an apocalyptic number.

12635523611543 is a deficient number, since it is larger than the sum of its proper divisors (2150595852937).

12635523611543 is a wasteful number, since it uses less digits than its factorization.

12635523611543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842327 (or 1842320 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 47.

The spelling of 12635523611543 in words is "twelve trillion, six hundred thirty-five billion, five hundred twenty-three million, six hundred eleven thousand, five hundred forty-three".