12638782535 has 16 divisors (see below), whose sum is σ = 15460079904. Its totient is φ = 9915514752.

The previous prime is 12638782517. The next prime is 12638782543. The reversal of 12638782535 is 53528783621.

It is not a de Polignac number, because 12638782535 - 2²⁰ = 12637733959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608024 + ... + 628466.

It is an arithmetic number, because the mean of its divisors is an integer number (966254994).

Almost surely, 2^12638782535 is an apocalyptic number.

12638782535 is a deficient number, since it is larger than the sum of its proper divisors (2821297369).

12638782535 is a wasteful number, since it uses less digits than its factorization.

12638782535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22834.

The product of its digits is 2419200, while the sum is 50.

The spelling of 12638782535 in words is "twelve billion, six hundred thirty-eight million, seven hundred eighty-two thousand, five hundred thirty-five".