12642561699839 has 8 divisors (see below), whose sum is σ = 12701637255552. Its totient is φ = 12583507416480.

The previous prime is 12642561699829. The next prime is 12642561699863. The reversal of 12642561699839 is 93899616524621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12642561699839 - 2⁴⁰ = 11543050072063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642561699829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4126052 + ... + 6504569.

It is an arithmetic number, because the mean of its divisors is an integer number (1587704656944).

Almost surely, 2^{12642561699839} is an apocalyptic number.

12642561699839 is a deficient number, since it is larger than the sum of its proper divisors (59075555713).

12642561699839 is a wasteful number, since it uses less digits than its factorization.

12642561699839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10636177.

The product of its digits is 302330880, while the sum is 71.

The spelling of 12642561699839 in words is "twelve trillion, six hundred forty-two billion, five hundred sixty-one million, six hundred ninety-nine thousand, eight hundred thirty-nine".