27805505505 has 16 divisors (see below), whose sum is σ = 44577267840. Its totient is φ = 14800116608.

The previous prime is 27805505471. The next prime is 27805505543. The reversal of 27805505505 is 50550550872.

It is a cyclic number.

It is not a de Polignac number, because 27805505505 - 2⁸ = 27805505249 is a prime.

It is a super-2 number, since 2×27805505505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1835100 + ... + 1850189.

It is an arithmetic number, because the mean of its divisors is an integer number (2786079240).

Almost surely, 2^27805505505 is an apocalyptic number.

It is an amenable number.

27805505505 is a deficient number, since it is larger than the sum of its proper divisors (16771762335).

27805505505 is a wasteful number, since it uses less digits than its factorization.

27805505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685800.

The product of its (nonzero) digits is 350000, while the sum is 42.

The spelling of 27805505505 in words is "twenty-seven billion, eight hundred five million, five hundred five thousand, five hundred five".