12805248771 has 112 divisors (see below), whose sum is σ = 23038271488. Its totient is φ = 6959908800.

The previous prime is 12805248733. The next prime is 12805248773. The reversal of 12805248771 is 17784250821.

It is not a de Polignac number, because 12805248771 - 2⁶ = 12805248707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12805248773) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 9649110 + ... + 9650436.

Almost surely, 2^12805248771 is an apocalyptic number.

12805248771 is a deficient number, since it is larger than the sum of its proper divisors (10233022717).

12805248771 is an equidigital number, since it uses as much as digits as its factorization.

12805248771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 12805248771 in words is "twelve billion, eight hundred five million, two hundred forty-eight thousand, seven hundred seventy-one".