12642166869 has 16 divisors (see below), whose sum is σ = 17028451200. Its totient is φ = 8342049600.

The previous prime is 12642166861. The next prime is 12642166897. The reversal of 12642166869 is 96866124621.

It is not a de Polignac number, because 12642166869 - 2³ = 12642166861 is a prime.

It is a super-2 number, since 2×12642166869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642166861) 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, 1670907 + ... + 1678455.

It is an arithmetic number, because the mean of its divisors is an integer number (1064278200).

Almost surely, 2^12642166869 is an apocalyptic number.

It is an amenable number.

12642166869 is a deficient number, since it is larger than the sum of its proper divisors (4386284331).

12642166869 is a wasteful number, since it uses less digits than its factorization.

12642166869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180.

The product of its digits is 1492992, while the sum is 51.

The spelling of 12642166869 in words is "twelve billion, six hundred forty-two million, one hundred sixty-six thousand, eight hundred sixty-nine".