1223345667778 has 12 divisors (see below), whose sum is σ = 1987031869218. Its totient is φ = 564621077280.

The previous prime is 1223345667737. The next prime is 1223345667833. The reversal of 1223345667778 is 8777665433221.

It can be written as a sum of positive squares in 3 ways, for example, as 522068386849 + 701277280929 = 722543^2 + 837423^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1809682603 + ... + 1809683278.

Almost surely, 2^{1223345667778} is an apocalyptic number.

1223345667778 is a deficient number, since it is larger than the sum of its proper divisors (763686201440).

1223345667778 is a wasteful number, since it uses less digits than its factorization.

1223345667778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619365909 (or 3619365896 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 61.

The spelling of 1223345667778 in words is "one trillion, two hundred twenty-three billion, three hundred forty-five million, six hundred sixty-seven thousand, seven hundred seventy-eight".