1223445667889 has 8 divisors (see below), whose sum is σ = 1236430806240. Its totient is φ = 1210468127616.

The previous prime is 1223445667867. The next prime is 1223445667933. The reversal of 1223445667889 is 9887665443221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223445667889 is a prime.

It is a super-2 number, since 2×1223445667889² (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 (1223445663889) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1575479 + ... + 2220140.

It is an arithmetic number, because the mean of its divisors is an integer number (154553850780).

Almost surely, 2^{1223445667889} is an apocalyptic number.

It is an amenable number.

1223445667889 is a deficient number, since it is larger than the sum of its proper divisors (12985138351).

1223445667889 is an equidigital number, since it uses as much as digits as its factorization.

1223445667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799039.

The product of its digits is 139345920, while the sum is 65.

The spelling of 1223445667889 in words is "one trillion, two hundred twenty-three billion, four hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".