1223455567819 has 2 divisors, whose sum is σ = 1223455567820. Its totient is φ = 1223455567818.

The previous prime is 1223455567739. The next prime is 1223455567837. The reversal of 1223455567819 is 9187655543221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223455567819 - 2¹¹ = 1223455565771 is a prime.

It is a super-2 number, since 2×1223455567819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223455561819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611727783909 + 611727783910.

It is an arithmetic number, because the mean of its divisors is an integer number (611727783910).

Almost surely, 2^{1223455567819} is an apocalyptic number.

1223455567819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223455567819 is an equidigital number, since it uses as much as digits as its factorization.

1223455567819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 58.

The spelling of 1223455567819 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-five million, five hundred sixty-seven thousand, eight hundred nineteen".