1223781259026 has 16 divisors (see below), whose sum is σ = 2447677162944. Its totient is φ = 407907978864.

The previous prime is 1223781259013. The next prime is 1223781259061. The reversal of 1223781259026 is 6209521873221.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4637790 + ... + 4894553.

It is an arithmetic number, because the mean of its divisors is an integer number (152979822684).

Almost surely, 2^{1223781259026} is an apocalyptic number.

1223781259026 is an abundant number, since it is smaller than the sum of its proper divisors (1223895903918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223781259026 is a wasteful number, since it uses less digits than its factorization.

1223781259026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9553745.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1223781259026 in words is "one trillion, two hundred twenty-three billion, seven hundred eighty-one million, two hundred fifty-nine thousand, twenty-six".