12344456777889 has 4 divisors (see below), whose sum is σ = 16459275703856. Its totient is φ = 8229637851924.

The previous prime is 12344456777833. The next prime is 12344456777903. The reversal of 12344456777889 is 98877765444321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12344456777889 - 2¹⁶ = 12344456712353 is a prime.

It is a super-2 number, since 2×12344456777889² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 12344456777889.

It is not an unprimeable number, because it can be changed into a prime (12344456777489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057409462979 + ... + 2057409462984.

It is an arithmetic number, because the mean of its divisors is an integer number (4114818925964).

Almost surely, 2^{12344456777889} is an apocalyptic number.

It is an amenable number.

12344456777889 is a deficient number, since it is larger than the sum of its proper divisors (4114818925967).

12344456777889 is an equidigital number, since it uses as much as digits as its factorization.

12344456777889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114818925966.

The product of its digits is 2275983360, while the sum is 75.

The spelling of 12344456777889 in words is "twelve trillion, three hundred forty-four billion, four hundred fifty-six million, seven hundred seventy-seven thousand, eight hundred eighty-nine".