12344566778889 has 8 divisors (see below), whose sum is σ = 16464842016000. Its totient is φ = 8227001363856.

The previous prime is 12344566778879. The next prime is 12344566778897. The reversal of 12344566778889 is 98887766544321.

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

It is not a de Polignac number, because 12344566778889 - 2¹⁵ = 12344566746121 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12344566778809) 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 7 ways as a sum of consecutive naturals, for example, 677444889 + ... + 677463110.

It is an arithmetic number, because the mean of its divisors is an integer number (2058105252000).

Almost surely, 2^{12344566778889} is an apocalyptic number.

It is an amenable number.

12344566778889 is a deficient number, since it is larger than the sum of its proper divisors (4120275237111).

12344566778889 is a wasteful number, since it uses less digits than its factorization.

12344566778889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354911039.

The product of its digits is 3901685760, while the sum is 78.

The spelling of 12344566778889 in words is "twelve trillion, three hundred forty-four billion, five hundred sixty-six million, seven hundred seventy-eight thousand, eight hundred eighty-nine".