12642661644800 has 120 divisors (see below), whose sum is σ = 34170744307392. Its totient is φ = 4597331456000.

The previous prime is 12642661644733. The next prime is 12642661644829. The reversal of 12642661644800 is 844616624621.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44755016 + ... + 45036615.

Almost surely, 2^{12642661644800} is an apocalyptic number.

12642661644800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12642661644800 is an abundant number, since it is smaller than the sum of its proper divisors (21528082662592).

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

12642661644800 is an equidigital number, since it uses as much as digits as its factorization.

12642661644800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89791670 (or 89791649 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 12642661644800 in words is "twelve trillion, six hundred forty-two billion, six hundred sixty-one million, six hundred forty-four thousand, eight hundred".