12642538875505 has 16 divisors (see below), whose sum is σ = 18914551668864. Its totient is φ = 7881063194880.

The previous prime is 12642538875503. The next prime is 12642538875521. The reversal of 12642538875505 is 50557883524621.

It is not a de Polignac number, because 12642538875505 - 2¹ = 12642538875503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12642538875503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16418881272 + ... + 16418882041.

It is an arithmetic number, because the mean of its divisors is an integer number (1182159479304).

Almost surely, 2^{12642538875505} is an apocalyptic number.

It is an amenable number.

12642538875505 is a deficient number, since it is larger than the sum of its proper divisors (6272012793359).

12642538875505 is a wasteful number, since it uses less digits than its factorization.

12642538875505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32837763336.

The product of its (nonzero) digits is 80640000, while the sum is 61.

The spelling of 12642538875505 in words is "twelve trillion, six hundred forty-two billion, five hundred thirty-eight million, eight hundred seventy-five thousand, five hundred five".