27802775805 has 16 divisors (see below), whose sum is σ = 50839361664. Its totient is φ = 12709840320.

The previous prime is 27802775779. The next prime is 27802775807. The reversal of 27802775805 is 50857720872.

It is not a de Polignac number, because 27802775805 - 2⁵ = 27802775773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27802775807) 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, 132394066 + ... + 132394275.

It is an arithmetic number, because the mean of its divisors is an integer number (3177460104).

Almost surely, 2^27802775805 is an apocalyptic number.

It is an amenable number.

27802775805 is a deficient number, since it is larger than the sum of its proper divisors (23036585859).

27802775805 is a wasteful number, since it uses less digits than its factorization.

27802775805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264788356.

The product of its (nonzero) digits is 2195200, while the sum is 51.

The spelling of 27802775805 in words is "twenty-seven billion, eight hundred two million, seven hundred seventy-five thousand, eight hundred five".