27805005580 has 48 divisors (see below), whose sum is σ = 63724631040. Its totient is φ = 10106801600.

The previous prime is 27805005541. The next prime is 27805005583. The reversal of 27805005580 is 8550050872.

It is a super-3 number, since 3×27805005580³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (27805005583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545631 + ... + 594409.

It is an arithmetic number, because the mean of its divisors is an integer number (1327596480).

Almost surely, 2^27805005580 is an apocalyptic number.

27805005580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27805005580 is an abundant number, since it is smaller than the sum of its proper divisors (35919625460).

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

27805005580 is a wasteful number, since it uses less digits than its factorization.

27805005580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51390 (or 51388 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 27805005580 in words is "twenty-seven billion, eight hundred five million, five thousand, five hundred eighty".