12635531534403 has 12 divisors (see below), whose sum is σ = 18277065682720. Its totient is φ = 8411806602576.

The previous prime is 12635531534369. The next prime is 12635531534441. The reversal of 12635531534403 is 30443513553621.

12635531534403 is a `hidden beast` number, since 1 + 2 + 6 + 3 + 5 + 53 + 153 + 440 + 3 = 666.

It is not a de Polignac number, because 12635531534403 - 2³² = 12631236567107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12635531534503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 990083851 + ... + 990096612.

Almost surely, 2^{12635531534403} is an apocalyptic number.

12635531534403 is a deficient number, since it is larger than the sum of its proper divisors (5641534148317).

12635531534403 is a wasteful number, since it uses less digits than its factorization.

12635531534403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980181178 (or 1980181175 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 45.

The spelling of 12635531534403 in words is "twelve trillion, six hundred thirty-five billion, five hundred thirty-one million, five hundred thirty-four thousand, four hundred three".