27805258806 has 32 divisors (see below), whose sum is σ = 63040266240. Its totient is φ = 8105176224.

The previous prime is 27805258777. The next prime is 27805258813. The reversal of 27805258806 is 60885250872.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 9379510 + ... + 9382473.

It is an arithmetic number, because the mean of its divisors is an integer number (1970008320).

Almost surely, 2^27805258806 is an apocalyptic number.

27805258806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

27805258806 is an abundant number, since it is smaller than the sum of its proper divisors (35235007434).

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

27805258806 is a wasteful number, since it uses less digits than its factorization.

27805258806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18762020.

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 27805258806 in words is "twenty-seven billion, eight hundred five million, two hundred fifty-eight thousand, eight hundred six".