12785894487 has 24 divisors (see below), whose sum is σ = 18660614544. Its totient is φ = 8435435904.

The previous prime is 12785894441. The next prime is 12785894503. The reversal of 12785894487 is 78449858721.

12785894487 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 589 + 4 + 48 + 7 = 666.

12785894487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12785894487 - 2¹¹ = 12785892439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785894587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 988353 + ... + 1001205.

It is an arithmetic number, because the mean of its divisors is an integer number (777525606).

Almost surely, 2^12785894487 is an apocalyptic number.

12785894487 is a deficient number, since it is larger than the sum of its proper divisors (5874720057).

12785894487 is a wasteful number, since it uses less digits than its factorization.

12785894487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13999 (or 13996 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 12785894487 in words is "twelve billion, seven hundred eighty-five million, eight hundred ninety-four thousand, four hundred eighty-seven".