12642264919 has 4 divisors (see below), whose sum is σ = 12697957944. Its totient is φ = 12586571896.

The previous prime is 12642264917. The next prime is 12642264949. The reversal of 12642264919 is 91946224621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12642264919 - 2¹ = 12642264917 is a prime.

It is a super-2 number, since 2×12642264919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642264917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27846172 + ... + 27846625.

It is an arithmetic number, because the mean of its divisors is an integer number (3174489486).

Almost surely, 2^12642264919 is an apocalyptic number.

12642264919 is a deficient number, since it is larger than the sum of its proper divisors (55693025).

12642264919 is an equidigital number, since it uses as much as digits as its factorization.

12642264919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55693024.

The product of its digits is 373248, while the sum is 46.

The spelling of 12642264919 in words is "twelve billion, six hundred forty-two million, two hundred sixty-four thousand, nine hundred nineteen".