27720985600 has 660 divisors, whose sum is σ = 89582500728. Its totient is φ = 8429568000.

The previous prime is 27720985597. The next prime is 27720985627. The reversal of 27720985600 is 658902772.

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, 676121580 + ... + 676121620.

Almost surely, 2^27720985600 is an apocalyptic number.

27720985600 is a gapful number since it is divisible by the number (20) 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 27720985600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44791250364).

27720985600 is an abundant number, since it is smaller than the sum of its proper divisors (61861515128).

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

27720985600 is an equidigital number, since it uses as much as digits as its factorization.

27720985600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 27720985600 in words is "twenty-seven billion, seven hundred twenty million, nine hundred eighty-five thousand, six hundred".