1228196855808 has 720 divisors, whose sum is σ = 4044747994560. Its totient is φ = 356272570368.

The previous prime is 1228196855791. The next prime is 1228196855861. The reversal of 1228196855808 is 8085586918221.

1228196855808 is a `hidden beast` number, since 1 + 2 + 2 + 8 + 19 + 68 + 558 + 0 + 8 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 3923951460 + ... + 3923951772.

It is an arithmetic number, because the mean of its divisors is an integer number (5617705548).

Almost surely, 2^{1228196855808} is an apocalyptic number.

1228196855808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228196855808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2022373997280).

1228196855808 is an abundant number, since it is smaller than the sum of its proper divisors (2816551138752).

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

1228196855808 is a wasteful number, since it uses less digits than its factorization.

1228196855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 63.

The spelling of 1228196855808 in words is "one trillion, two hundred twenty-eight billion, one hundred ninety-six million, eight hundred fifty-five thousand, eight hundred eight".