1234445667889 has 4 divisors (see below), whose sum is σ = 1410795049024. Its totient is φ = 1058096286756.

The previous prime is 1234445667877. The next prime is 1234445667893. The reversal of 1234445667889 is 9887665444321.

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 a cyclic number.

It is not a de Polignac number, because 1234445667889 - 2¹³ = 1234445659697 is a prime.

It is a super-2 number, since 2×1234445667889² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1234445667809) 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, 88174690557 + ... + 88174690570.

It is an arithmetic number, because the mean of its divisors is an integer number (352698762256).

Almost surely, 2^{1234445667889} is an apocalyptic number.

It is an amenable number.

1234445667889 is a deficient number, since it is larger than the sum of its proper divisors (176349381135).

1234445667889 is an equidigital number, since it uses as much as digits as its factorization.

1234445667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176349381134.

The product of its digits is 278691840, while the sum is 67.

The spelling of 1234445667889 in words is "one trillion, two hundred thirty-four billion, four hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".