1236978604800 has 540 divisors, whose sum is σ = 4579602051640. Its totient is φ = 329433661440.

The previous prime is 1236978604781. The next prime is 1236978604921. The reversal of 1236978604800 is 84068796321.

1236978604800 is a `hidden beast` number, since 1 + 2 + 36 + 9 + 78 + 60 + 480 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 768786396 + ... + 768788004.

Almost surely, 2^{1236978604800} is an apocalyptic number.

1236978604800 is a gapful number since it is divisible by the number (10) 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 1236978604800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289801025820).

1236978604800 is an abundant number, since it is smaller than the sum of its proper divisors (3342623446840).

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

1236978604800 is a wasteful number, since it uses less digits than its factorization.

1236978604800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1236978604800 in words is "one trillion, two hundred thirty-six billion, nine hundred seventy-eight million, six hundred four thousand, eight hundred".