12642660419 has 4 divisors (see below), whose sum is σ = 13386346344. Its totient is φ = 11898974496.

The previous prime is 12642660409. The next prime is 12642660421. The reversal of 12642660419 is 91406624621.

12642660419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12642660419 is a prime.

It is a super-2 number, since 2×12642660419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12642660409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371842937 + ... + 371842970.

It is an arithmetic number, because the mean of its divisors is an integer number (3346586586).

Almost surely, 2^12642660419 is an apocalyptic number.

12642660419 is a deficient number, since it is larger than the sum of its proper divisors (743685925).

12642660419 is an equidigital number, since it uses as much as digits as its factorization.

12642660419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743685924.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 12642660419 in words is "twelve billion, six hundred forty-two million, six hundred sixty thousand, four hundred nineteen".