1222823595978 has 64 divisors (see below), whose sum is σ = 2782319569920. Its totient is φ = 397879652016.

The previous prime is 1222823595893. The next prime is 1222823595991. The reversal of 1222823595978 is 8795953282221.

1222823595978 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 8 + 2 + 35 + 9 + 597 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3567601 + ... + 3895307.

It is an arithmetic number, because the mean of its divisors is an integer number (43473743280).

Almost surely, 2^{1222823595978} is an apocalyptic number.

1222823595978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222823595978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391159784960).

1222823595978 is an abundant number, since it is smaller than the sum of its proper divisors (1559495973942).

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

1222823595978 is a wasteful number, since it uses less digits than its factorization.

1222823595978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329368 (or 329362 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 1222823595978 in words is "one trillion, two hundred twenty-two billion, eight hundred twenty-three million, five hundred ninety-five thousand, nine hundred seventy-eight".