27985720099 has 16 divisors (see below), whose sum is σ = 29709519840. Its totient is φ = 26314848000.

The previous prime is 27985720067. The next prime is 27985720109. The reversal of 27985720099 is 99002758972.

It is a cyclic number.

It is not a de Polignac number, because 27985720099 - 2⁵ = 27985720067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27985720019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 658309 + ... + 699529.

It is an arithmetic number, because the mean of its divisors is an integer number (1856844990).

Almost surely, 2^27985720099 is an apocalyptic number.

27985720099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

27985720099 is a deficient number, since it is larger than the sum of its proper divisors (1723799741).

27985720099 is a wasteful number, since it uses less digits than its factorization.

27985720099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41862.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 27985720099 in words is "twenty-seven billion, nine hundred eighty-five million, seven hundred twenty thousand, ninety-nine".