27780508005 has 16 divisors (see below), whose sum is σ = 44451098304. Its totient is φ = 14815509120.

The previous prime is 27780508003. The next prime is 27780508009. The reversal of 27780508005 is 50080508772.

It is a happy number.

It is not a de Polignac number, because 27780508005 - 2¹ = 27780508003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780508003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374622 + ... + 442608.

It is an arithmetic number, because the mean of its divisors is an integer number (2778193644).

Almost surely, 2^27780508005 is an apocalyptic number.

It is an amenable number.

27780508005 is a deficient number, since it is larger than the sum of its proper divisors (16670590299).

27780508005 is a wasteful number, since it uses less digits than its factorization.

27780508005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95236.

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 27780508005 in words is "twenty-seven billion, seven hundred eighty million, five hundred eight thousand, five".