1223445056779 has 8 divisors (see below), whose sum is σ = 1337995686960. Its totient is φ = 1109449152000.

The previous prime is 1223445056773. The next prime is 1223445056807. The reversal of 1223445056779 is 9776505443221.

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-1223445056779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223445056773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138676734 + ... + 138685555.

It is an arithmetic number, because the mean of its divisors is an integer number (167249460870).

Almost surely, 2^{1223445056779} is an apocalyptic number.

1223445056779 is a deficient number, since it is larger than the sum of its proper divisors (114550630181).

1223445056779 is a wasteful number, since it uses less digits than its factorization.

1223445056779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277362701.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 1223445056779 in words is "one trillion, two hundred twenty-three billion, four hundred forty-five million, fifty-six thousand, seven hundred seventy-nine".