12289510785 has 16 divisors (see below), whose sum is σ = 19900125504. Its totient is φ = 6475436352.

The previous prime is 12289510741. The next prime is 12289510789. The reversal of 12289510785 is 58701598221.

It is not a de Polignac number, because 12289510785 - 2⁸ = 12289510529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12289510789) 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, 4934302 + ... + 4936791.

It is an arithmetic number, because the mean of its divisors is an integer number (1243757844).

Almost surely, 2^12289510785 is an apocalyptic number.

12289510785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12289510785 is a deficient number, since it is larger than the sum of its proper divisors (7610614719).

12289510785 is an equidigital number, since it uses as much as digits as its factorization.

12289510785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871184.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 12289510785 in words is "twelve billion, two hundred eighty-nine million, five hundred ten thousand, seven hundred eighty-five".