12785403775 has 12 divisors (see below), whose sum is σ = 16786483632. Its totient is φ = 9626656640.

The previous prime is 12785403773. The next prime is 12785403779. The reversal of 12785403775 is 57730458721.

It is a happy number.

It is not a de Polignac number, because 12785403775 - 2¹ = 12785403773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785403773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15041227 + ... + 15042076.

It is an arithmetic number, because the mean of its divisors is an integer number (1398873636).

Almost surely, 2^12785403775 is an apocalyptic number.

12785403775 is a deficient number, since it is larger than the sum of its proper divisors (4001079857).

12785403775 is a wasteful number, since it uses less digits than its factorization.

12785403775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30083330 (or 30083325 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 12785403775 in words is "twelve billion, seven hundred eighty-five million, four hundred three thousand, seven hundred seventy-five".